Equipment inspection and evaluation system, equipment management system, and computer-readable record medium with equipment management program stored therein

ABSTRACT

An equipment inspecting and evaluating system can be used to inspect and evaluate steam traps by detecting a level of vibrations of each trap and the surface temperature of the housing of that trap. The detected vibration level and temperature are used to determine whether or not steam is leaking through that trap and to what extent steam leakage is. An equipment management system is connected to the inspection and evaluation system by a data transmission cable and receives inspection data of the traps from the inspection and evaluation system. The management system analyzes the received inspection data for computing the number of defective traps, the ratio of defective traps to the entire traps, the loss caused by steam leakage, etc.

RELATED APPLICATION(S)

This application is a divisional of patent application Ser. No.09/115,354, filed Jul. 14, 1998 now U.S. Pat. No. 6,728,659.

FIELD OF THE INVENTION

This invention relates to an equipment inspection and evaluation systemfor inspecting and evaluating constituent devices of equipment, e.g.steam traps forming parts of a piping system of steam-utilizingequipment. This invention relates also to an equipment management systemfor managing such equipment on the basis of various informationincluding evaluation of the equipment made by such equipment inspectionand evaluation system, and, in particular, to such an equipmentmanagement system using a computer.

BACKGROUND OF THE INVENTION

A steam trap is an automatic valve which automatically drains andremoves condensate from steam lines of steam-utilizing equipment of aplant without permitting steam to escape from the lines. If any one ofsuch steam traps fails to operate normally, for example, when steamleaks through the steam trap or the valve becomes inoperative, theefficiency of the plant decreases and, in some cases, the entire plantmalfunctions. It is, therefore, important to periodically inspect andevaluate individual steam traps to maintain the steam-utilizingequipment.

In general, steam-utilizing equipment includes a large number of steamtraps, and evaluation of them requires a great deal of work and time,and, hence, great cost. Furthermore, in order to make the inspection,evaluation and maintenance of steam traps reliable, information on theequipment, including the results of the evaluation of individual steamtraps, should be centrally managed so that operating states of theindividual steam traps as part of the entire equipment can bedetermined.

Accordingly, an object of the present invention is to provide anequipment inspection and evaluation system which can efficiently inspectand evaluate individual devices forming parts of equipment, e.g. steamtraps of steam-utilizing equipment.

Another object of the present invention is to provide an equipmentmanagement system which can reliably and efficiently manage informationabout individual devices, e.g. steam traps, including results ofevaluation made by the equipment inspection and evaluation system.

Still another object of the present invention is to provide a recordmedium with an equipment management program stored therein for use inrealizing a computerized equipment management system.

SUMMARY OF THE INVENTION

According to the present invention, an equipment inspection andevaluation system for inspecting and evaluating individual devicesforming the equipment includes a main memory section in which aplurality of inspection data processing sequences for processing dataobtained by inspecting respective ones of a plurality of devices formingthe equipment are stored. The system includes also an auxiliary memorysection. A sequence storage control section receives at least oneexternally applied sequence storage command, selects one of theinspection data processing sequences stored in the main memory sectioncorresponding to the received at least one sequence storage command, andstores the selected inspection data processing sequence in the auxiliarymemory section. The system includes further a sequence calling sectionwhich receives an externally applied sequence calling commandcorresponding to one of the devices, and selects the inspection dataprocessing sequences stored in the auxiliary memory sectioncorresponding to the received sequence calling command. An inspectiondata processing section receives inspection data obtained by actualinspection of the one device, processes the received inspection data toevaluate the inspected one device in accordance with the inspection dataprocessing sequence for the one device called by the sequence callingsection, and outputs the results of the processing.

The main memory section contains inspection data processing sequencesfor substantially all of commercially available devices, e.g. steamtraps, which means that a large number of inspection data processingsequences are stored in the main memory section.

The inspection data processing section processes data obtained byinspecting a particular device to evaluate the operation of thatparticular device on the basis of the inspection data processingsequence for that particular device. In other words, different sequencesare employed for different devices. Accordingly, reliable evaluation ofdevices can be made.

These inspection data processing sequences are stored in the main memorysection. Since there are a number of such sequences, it is not easy tolocate a desired one out of them.

The sequence storage control section selects only ones of the inspectiondata processing sequences in the main memory section for devices to beevaluated and stores the selected sequences in the auxiliary memorysection. The selection and storage in the auxiliary memory section ofinspection data processing sequences are done in response to thesequence storage commands applied to the sequence storage controlsection. When a particular device is to be evaluated, the sequencecalling section calls a desired processing sequence corresponding tothat particular device stored in the auxiliary memory section. Thus, adesired sequence can be selected from a smaller number of sequences, sothat the selection is easier.

The devices forming the equipment may be of a plurality of differenttypes, and the auxiliary memory section may include a plurality ofstorage regions for the respective types of the devices. The sequencestorage control section causes the inspection data processing sequencecorresponding to each sequence storage command to be stored in thestorage region of the auxiliary memory section for the type of thedevice to be evaluated in accordance with that inspection dataprocessing sequence. The sequence calling command comprises acombination of a type selection command for selecting a desired one ofthe types of the devices and a sequence selection command for selectinga desired one of the inspection data processing sequences. The sequencecalling section selects one of the storage regions corresponding to thetype selected in response to the type selection command, and calls adesired one of the inspection data processing sequences stored in theselected storage region corresponding to the sequence selection command.

The auxiliary memory section is divided into plural storage regions.Inspection data processing sequences to be stored in the auxiliarymemory section are sorted in accordance with types of the devicescorresponding to the respective inspection data processing sequences,and are stored in the storage regions for the respective types. Thesequence calling section first selects the storage region for the typein accordance with a type selection command, e.g. the type of the deviceto be evaluated. The sequence calling section then calls the inspectiondata processing sequence corresponding to the sequence selectioncommand, i.e. the sequence for the device to be evaluated, from theprocessing sequences stored in the selected storage regions. The regionfrom which the inspection data processing sequences are selected isfurther subdivided.

According to an aspect of the present invention, an equipment inspectionand evaluation system is provided for inspecting and evaluating aplurality of devices, including at least one trap and at least onevalve, forming equipment, which includes a sequence memory sectionhaving stored therein a trap inspection and evaluation sequence to beexecuted for inspecting and evaluating a trap in a piping system. Thesequence memory section has further stored therein a valve inspectionand evaluation sequence to be executed for inspecting and evaluating avalve in the piping system. A sequence selecting section selects one ofthe trap and valve evaluation sequences in response to an externallyapplied sequence selection command corresponding to a device to beinspected and evaluated. The system further includes a device inspectingand evaluating section for inspecting and evaluating a device inaccordance with the inspection and evaluation sequence selected by thesequence selecting section.

The term “trap” used in the specification of this application representsa steam trap disposed in steam lines, an air trap in compressed airpiping or a gas trap disposed in gas piping, for example. Also, the term“valve” used herein represents a manually operable valve, an automaticvalve or a pressure-regulating valve, for example.

The sequence memory section contains a trap inspection and evaluationsequence for use in inspecting and evaluating traps, and a valveinspection and evaluation sequence for use in inspecting and evaluatingvalves. When the sequence selection command for selecting the trapinspection and evaluation sequence is externally applied to the sequenceselecting section, the sequence selecting section selects the trapinspection and evaluation sequence, and the device inspecting andevaluating section inspects and evaluates a trap in accordance with theselected trap inspection and evaluation sequence. For inspection andevaluation of valves, the sequence selection command for valves isapplied, and the sequence selecting section selects the valve inspectionand evaluation sequence, according to which the device inspecting andevaluating section inspects and evaluates valves. Accordingly, with asingle inspection and evaluation system, reliable inspection andevaluation of both traps and valves can be made.

According to another feature of the invention, there is provided anequipment inspection and evaluation system for inspecting and evaluatingequipment including a plurality of devices including at least one trapand at least one valve. The system includes a sequence memory sectionhaving stored therein a trap inspection and evaluation sequence to beexecuted for inspecting and evaluating the trap in a piping system and avalve inspection and evaluation sequence to be executed for inspectingand evaluating the valve in the piping system. A sequence selectingsection selects either of the trap and valve inspection and evaluationsequence in response to an externally applied sequence selection commandcorresponding to devices to be inspected and evaluated. The systemincludes also a device inspecting and evaluating section having firstand second inspection and evaluation modes which can alternate with eachother. The device inspecting and evaluating section makes inspection andevaluation of devices in one of the first and second inspection andevaluation modes selected in response to an externally applied modeselection command. When in the first mode, the device inspecting andevaluating section inspects and evaluates devices in accordance with theinspection and evaluation sequences selected by the sequence selectingsection. The device inspecting and evaluating section, when in thesecond mode, inspects and evaluates a predetermined number, e.g. two, oftraps or valves (or inspects and evaluates the same trap or valve apredetermined number of times, twice in the present case) in accordancewith the selected one of the inspection and evaluation sequencesselected by the sequence selecting section and, then, inspects andevaluates the same number, i.e. two in this case, of valves or traps (orinspects and evaluates the same valve or trap the same number of times,i.e. twice) in accordance with the other evaluation sequence. Thealternation of the modes is done automatically.

The sequence memory section contains a trap inspection and evaluationsequence and a valve inspection and evaluation sequence. Assuming thatonly traps are to be inspected and evaluated, a sequence selectioncommand for selecting the trap inspection and evaluation sequence isapplied together with a mode selection command for selecting the firstinspection and evaluation mode. The sequence selecting section selectsthe trap inspection and evaluation sequence, and the device inspectingand evaluating section inspects and evaluates the traps in accordancewith the trap inspection and evaluation sequence.

On the other hand, if only valves should be evaluated, a sequenceselection command for selecting the valve inspection and evaluationsequence together with a mode selection command for selecting the firstinspection and evaluation mode is applied. Then, the sequence selectingsection selects the valve inspection and evaluation sequence, and thedevice inspecting and evaluating section inspects and evaluates thevalves in accordance with the valve inspection and evaluation sequence.

For evaluating both traps and valves, the sequence selection command forselecting devices to be evaluated first, e.g. traps, is applied to thesystem together with the mode selection command for selecting the secondinspection and evaluation mode. Then, the sequence selecting sectionselects the trap inspection and evaluation sequence, and the deviceinspecting and evaluating section inspects and evaluates a predeterminednumber, e.g. two, of traps in accordance with the trap inspection andevaluation sequence. When the inspection and evaluation of thepredetermined number of traps is finished, the device inspecting andevaluating section starts inspection and evaluation of the same number,i.e. two in this case, of valves in accordance with the valve inspectionand evaluation sequence. After that, the inspection and evaluation oftraps and the inspection and evaluation of valves may be donealternately until a desired number of traps and valves are inspected andevaluated. It should be noted that instead of inspecting and evaluatinga predetermined number of devices, the same device can be inspected andevaluated the predetermined number of times.

If the inspection and evaluation of valves should be done first, thesequence selection command for selecting the valve inspection andevaluation sequence is applied first.

The equipment inspection and evaluation section of the equipmentinspection and evaluation system may include a vibration detectingsection for detecting vibrations occurring in each device. The vibrationdetecting section provides vibration representative data representingthe detected vibrations. The inspection and evaluation section includesalso a detection data processing section, which receives the vibrationrepresentative data from the vibration detecting section and processesthe received vibration representative data in accordance with theinspection and evaluation sequence being currently executed. The trapinspection and evaluation sequence causes the detection data processingsection to process the vibration representative data in accordance witha stored correlation between the amount of leakage of a fluid beingregulated by each trap and the magnitude of vibrations of that trapcaused by the fluid leakage, to thereby compute the amount of fluidleakage through that trap. The valve inspection and evaluation sequencecauses the detection data processing section to compute the magnitude ofvibrations in each valve from the vibration representative data.

The term “fluid” used herein represents steam when traps and valves areused in steam lines, for example. For traps and valves used in pipingfor compressed air, the fluid is compressed air. If traps and valves areused in piping for a gas, the gas is the “fluid”.

According to the above-described system, when a fluid leaks through atrap, the amount of leakage of fluid is computed from the magnitude orlevel of ultrasonic vibrations produced in the trap, more specifically,the housing of the trap, due to the fluid leakage. The computation isdone on the basis of the fact that the magnitude or level of vibrationsof a trap and the amount of leakage of the fluid correlate to eachother. For evaluating traps in accordance with the trap inspection andevaluation sequence, the vibration detecting section detects vibrationsgenerated in the trap housing and provides detected vibrationrepresentative data representing the detected vibrations. The data fromthe vibration detecting section is processed in the detection dataprocessing section to compute the amount of the leakage of the fluid.

The inspection and evaluation of valves in accordance with the valveinspection and evaluation sequence is based on the fact that leakage ofa fluid through a valve generates ultrasonic vibrations in the valve orvalve housing. The vibration detecting section detects vibrations of thevalve housing and provides detected vibration representative data, whichis processed in the detection data processing section to compute themagnitude or level of the vibrations.

Usually, valves are subject to minute vibrations caused by backgroundnoise. According to the present invention, whether vibrations occurringin valves are caused by background noise or by leakage of a fluid can bedetermined from the vibration level computed by the detection dataprocessing section.

The device equipment inspection and evaluation system of the presentinvention may include a vibration detecting section detecting vibrationsgenerated in the devices and providing vibration representative datarepresenting detected vibrations, a temperature detecting sectiondetecting the temperature of the devices and providing temperaturerepresentative data representing detected temperatures, and a detectiondata processing section receiving the vibration representative data andthe temperature representative data and processing the received data inaccordance with that one of the inspection and evaluation sequenceswhich is being currently employed. The trap inspection and evaluationsequence causes the detection data processing section to process thevibration and temperature representative data in accordance with astored correlation between the amount of leakage of a fluid beingregulated by a trap and the magnitude of vibrations of the trap causedby the fluid leakage and the temperature of the trap, to thereby computethe amount of fluid leakage through the trap. The valve inspection andevaluation sequence causes the detection data processing section tocompute the magnitude of vibrations in a valve from at least thevibration representative data.

According to this feature, the amount of leakage of a fluid in a trap iscomputed from the level of the detected vibrations in accordance withthe trap inspection and evaluation sequence, on the basis of thecorrelation existing between the amount of leakage and the level ofultrasonic vibrations generated in the trap by the leakage of the fluid.Strictly speaking, however, the correlation between the vibration leveland the amount of fluid leakage depends on the pressure of the fluid inthe trap. The fluid pressure in the trap and the temperature of the trapcorrelate to each other. Accordingly, the temperature of the trap isdetected by the temperature detecting section, and the detectedtemperature representative data is processed in the detection dataprocessing section to derive indirectly the fluid pressure within thetrap. The amount of fluid leakage is computed by processing the detectedvibration representative data on the basis of the correlation, with thefluid pressure being a parameter.

On the other hand, the inspection and evaluation of valves is based onultrasonic vibrations generated in the valves by the fluid leakagethrough the valves. The detection data processing section processes thedetected vibration representative data in accordance with the valveinspection and evaluation sequence to compute the magnitude of thevibrations occurring in the valve. According to the feature beingdiscussed, in addition to the detected vibration representative data,the detected temperature representative data representing thetemperature of the valve is supplied to the detection data processingsection. The surface temperature of the valve can be known by processingthe detected temperature representative data in the detection dataprocessing section.

The invention is also directed to an equipment management system. Theequipment management system includes a classifying section and ananalyzing section. The classifying section classifies a predeterminednumber of types of evaluation results obtained by inspecting andevaluating individual ones of plural devices forming equipment into aplurality of grades including first and second grades. The analyzingsection analyzes the classified evaluation results.

The first and second grades may represent normal operation (GOOD) of adevice and a failure (DEFECTIVE) of a device, respectively.

According to this invention, whether evaluation results should beclassified as GOOD or DEFECTIVE can be determined in the classifyingsection arbitrarily, for example, in accordance with the management planof a person running the equipment. The analyzing section analyzes theevaluation results as classified in the classifying section. The personwho is operating the equipment can freely determine the standardaccording to which the respective devices of the equipment are judged tobe normal or defective, and, therefore, maintenance and management ofthe equipment can be made in a manner desired by the person operatingthe equipment.

This invention also provides a computer-readable record medium in whichan equipment management program is recorded. The equipment managementprogram is executed to operate a computer to perform a classificationsequence for classifying evaluation results obtained by inspecting andevaluating individual devices forming equipment into a plurality ofgrades including first and second grades. The computer is also caused toperform an analyzing sequence for analyzing the evaluation results asclassified in accordance with the classification sequence.

The record medium may be a flexible disc (FD), a hard disc, a magnetictape, a CD-ROM, a magneto-optical (MO) disc, a digital versatile disc(DVD), or a paper tape.

The first and second grades may represent normal operation (GOOD) of adevice and a failure (DEFECTIVE) of a device, respectively.

According to the present invention, an equipment management system isprovided, which includes a detailed data storage section having recordedtherein detailed data of a plurality of devices forming equipment. Thedata are sorted on the basis of at least one predetermined basic itemcommon to all the devices. The system further includes an item addingsection through which any desired additional item common to all thedevices for managing the devices can be added to the detailed datastorage section. A data entry section is used to add data relating tothe added item of the devices, and a management data processing sectionprocesses the detailed data and added data which are stored in thedetailed data storage section.

The detailed data storage section has stored therein detailed data of aplurality of devices forming equipment. The detailed data includes dataof at least one predetermined basic item common to all the devices andis sorted and stored on an item-by-item basis. The system also includesan item adding section through which any desired additional item commonto all the devices necessary for managing the devices can beadditionally set in the detailed data storage section. Additional datarelating to the added item of the devices are entered through a dataentry section. The management data processing section processes thedetailed and additional data which are stored in the detailed datastorage section, for managing the equipment.

According to the present invention there is provided an equipmentmanagement system for managing equipment including a plurality ofdevices forming equipment, which includes a terminal apparatus and amanagement apparatus. The terminal apparatus includes a terminal memorysection, a management item setting section setting, in the terminalmemory section, a desired management item common to the devices, a dataentry section for entering data relating to the set management items,and a data transmitting section transmitting the data entered for therespective management items. The management apparatus includes a mainmemory in which detailed data of the respective devices are stored,being sorted on the basis of at least one basic management item commonto all the devices, a data receiving section receiving data transmittedfrom the data transmitting section of the terminal memory section, anadding section through which the data and corresponding management itemreceived by the receiving section are additionally stored in the mainmemory section, and a management data processing section processing theadded data added by the adding section and the detailed data stored inthe main memory section.

The main memory section of the management apparatus has stored thereindetailed data of the respective devices relating to the basic managementitems common to all the devices. A separate management item common tothe devices can be added by, for example, a person who is managing theequipment, through the terminal apparatus. The added item is transmittedto the management apparatus and additionally set in the main memorysection. The detailed data relating to the respective basic managementitems and the data relating to the added management item of the devicesare processed for the management of the respective devices.

According to the present invention, there is provided a record mediumhaving recorded therein an equipment management program which isexecuted by a computer to manage devices forming equipment. Theequipment managing program causes the computer to execute a managementitem adding sequence. The management item adding sequence is foradditionally setting in a detailed data memory section (in whichdetailed data, relating to at least one basic management item common toall the devices of the respective devices, is stored) an additionalmanagement item common to the devices. The program also causes thecomputer to execute a data entry sequence for entering additional datarelating to the additional management item of the respective devices.The computer also executes, in accordance with the equipment managingprogram, a management data processing sequence for processing thedetailed and additional data stored in the detailed data memory section.

The present invention can also provide a record medium having recordedtherein an equipment management program which is executed by a computerto manage devices forming equipment, to make the computer execute areceiving sequence for receiving, from a terminal apparatus, datarelating to management items common to all the devices. The computeralso executes, in accordance with the equipment management program, anadding sequence for adding the data and management items received inaccordance with the receiving sequence to a main memory section of amanagement apparatus, in which detailed data of the respective devicessorted on the basis of at least one basic management item common to thedevices has been stored. Also, the computer executes a management dataprocessing sequence for processing the data added in accordance with theadding sequence and the detailed data stored in the main memory sectionfor managing the devices of the equipment.

According to another feature of the present invention, there is providedan equipment management system for managing devices forming equipment,which includes a detailed data memory section, a display section havinga display screen, a first display control section, a symbol selectingsection, and a second display control section. The detailed data memorysection has stored therein detailed data of the respective devices. Thefirst display control section causes a representation of the equipmentto be displayed on the display screen and also causes symbolscorresponding to respective devices to be displayed at appropriatelocations on the representation of the equipment. The symbol selectingsection selects symbols displayed on the display screen, and the seconddisplay control section calls detailed data corresponding to theselected symbols from the detailed data memory section and causes thecalled detailed data to be displayed on the display screen.

According to this feature, a representation, e.g. a diagram, of theequipment is displayed on the display screen, and symbols, e.g. icons,are disposed on the equipment diagram to indicate that devicescorresponding to the respective icons are disposed in the equipment atlocations corresponding to the locations displayed on the diagram on thescreen. Desired ones of the icons are selected through the symbolselecting section. The second display control section calls detaileddata of the devices corresponding to the selected icons from thedetailed data memory section and displays the called detailed data onthe display screen. Thus, relationship in position among the respectivedevices in the equipment and detailed data of the devices can be readilygrasped on the display screen.

The detailed data of the device may include either first judgment dataindicating that the device is operating normally or second judgment dataindicating that the device is not operating normally. The first displaycontrol section causes a symbol of a device of which the detailed datacontains one of the first and second judgment data to be displayed in adifferent manner than a symbol of a device of which the detailed datacontains the other of the first and second judgment data.

Thus, whether the respective devices operate normally or not can bereadily known from their symbols displayed on the display screen.

Also, the first display control section may include an equipmentrepresentation display control section for use in displaying theequipment representation on the display screen in response to anexternally applied representation drawing command. In addition, thefirst display control section includes a symbol display control sectionfor use in displaying a symbol at a desired position on the equipmentrepresentation on the display screen in response to an externallyapplied symbol positioning command.

With this arrangement, a desired equipment representation can be freelydrawn on the display screen by applying a representation drawing commandto the equipment representation display control section. Also, theposition of each symbol on the display screen can be freely controlledby means of a symbol positioning command to the symbol display controlsection. Accordingly, this equipment management system can handleequipment of various dimensions and various constructions in whichindividual devices are disposed differently.

The present invention can also provide a computer-readable record mediumhaving recorded therein an equipment management program which isexecuted by a computer having a display screen for managing equipmentincluding a plurality of devices. The equipment management program makesthe computer execute a first display sequence, a symbol selectingsequence and a second display sequence. The first display sequence isfor displaying a representation of the equipment on the display screenand also displaying a symbol for at least one of the devices at anappropriate position on the equipment representation on the displayscreen. The symbol selecting sequence is for selecting a desired one ofthe symbols displayed on the display screen. The second display sequenceis for calling detailed data for the selected device out of detaileddata stored beforehand and displaying the called detailed data on thedisplay screen.

The detailed data for the respective devices may include either firstjudgment data indicating that the device is operating normally or secondjudgment data indicating that the device is not operating normally. Thefirst display control sequence causes a symbol of a device of which thedetailed data contains one of the first and second judgment data to bedisplayed in a different manner than a symbol of a device of which thedetailed data contains the other of the first and second judgment data.

With this record medium, a computer can display symbols of normallyoperating devices in a different manner than the remaining symbols.Alternatively, symbols for defective devices may be displayed in adifferent manner than the other symbols.

Also, the computer-readable record medium may contain a first displaysequence which includes an equipment representation displaying sequenceand a symbol displaying sequence. The equipment representationdisplaying sequence is for displaying the equipment representation onthe display screen in response to an externally applied representationdrawing command. The symbol displaying sequence is for displaying asymbol at a desired position on the equipment representation on thedisplay screen in response to an externally applied symbol positioningcommand.

A desired equipment representation can be freely drawn on the displayscreen by applying a representation drawing command to the computer.Also, the position of each symbol on the display screen can be freelycontrolled by applying a symbol positioning command to the computer.

According to another feature of the present invention, an equipmentmanagement system is provided, which includes a detailed data memorysection, a data retrieval condition setting section, a data retrievingsection and a data output section. The detailed data memory has storedtherein detailed data including indexes for a plurality of devicesforming equipment. The data retrieval condition setting section sets atleast one data retrieval condition for retrieving detailed data for adevice to be inspected and evaluated. The data retrieving sectionretrieves detailed data of a device meeting at least one of dataretrieval conditions. The data output section outputs at least part ofthe retrieved detailed data including the index.

The term “data output section” used herein represents, for example, adevice for outputting detailed data in the form of digital signals, anda device for outputting the indexes contained in the detailed data invisual and/or audio form.

The data retrieval condition setting section sets one or more desireddata retrieval conditions. The data retrieving section retrievesdetailed data meeting at least one of the set conditions, and theretrieved detailed data is displayed on a screen or output as digitaldata, for example.

The equipment management system may further include a data re-arrangingsection for re-arranging the detailed data retrieved by the dataretrieval section, and the data output section outputs at least part ofthe re-arranged detailed data, including their indexes.

The detailed data as retrieved by the data retrieval section arere-arranged or sorted, for example, in a predetermined order by the datare-arranging section. The re-arranged retrieved data are output in avisual and/or audio form or in a digital data form.

The present invention may provide a computer-readable record mediumhaving recorded therein an equipment management program which isexecuted by a computer for managing equipment including a plurality ofdevices. The equipment management program operates the computer toexecute a data retrieval condition setting sequence, a data retrievingsequence, and a data outputting sequence. The data retrieval conditionsetting sequence is for setting at least one data retrieval conditionfor retrieving detailed data for a device to be inspected and evaluated,and the data retrieving sequence is for retrieving detailed data of adevice meeting at least one of data retrieval conditions. The dataoutputting sequence is for outputting at least part of the retrieveddetailed data including its index.

A computer executing the program recorded in this record medium sets oneor more desired data retrieval conditions and then, retrieves detaileddata meeting the set conditions. The retrieved detailed data isdisplayed on a screen or output as sound or as digital data, forexample.

The program recorded on the record medium may further execute a datare-arranging sequence for re-arranging the retrieved detailed data. Thedata outputting sequence outputs at least part of the re-arrangeddetailed data including their indexes.

Accordingly, the respective detailed data as retrieved by the dataretrieval sequence are re-arranged in a predetermined order in the datare-arranging sequence. The re-arranged or sorted retrieved data areoutput in a visual and/or audio form or in a digital data form.

The present invention can further provide an equipment inspection andevaluation system including a device inspecting and evaluating sectionfor inspecting and evaluating a plurality of devices forming equipmentin accordance with a predetermined inspection and evaluation sequence.The system further includes an index memory section having storedtherein indexes for the respective devices. The indexes are arranged ina predetermined order. The system also includes an index calling sectionwhich first calls the foremost index and, then, calls succeeding indexesone by one in the predetermined order each time an external index outputcommand is applied. An index output section outputs indexes called bythe index calling section.

The indexes stored in the index memory section may be those of thedevices to be evaluated. The index output section outputs the indexes ina visual and/or audio form, for example.

With this system, the foremost index in the indexes arranged in order isfirst output through the index output section. When another index outputcommand is externally applied, the second one of the indexes is output.After that, each time the index output command is applied, thesucceeding indexes are successively output one by one. Using the indexesoutput through the index output section, an operator can determine inwhat order the devices should be inspected and evaluated.

The equipment inspection and evaluation system may include further anindex output command generating section which generates and applies anindex output command to the index calling section each time theinspection and evaluation section finishes inspection and evaluation ofa device.

Thus, the index output from the index output section is automaticallyrenewed in the predetermined order one by one each time inspection andevaluation of a device is finished.

In order for the device inspecting and evaluating section to be able tomake correct inspection and evaluation of devices when the deviceinspecting and evaluating section inspects and evaluates each device inaccordance with the inspection and evaluation sequence for that device,the inspection and evaluation system may further include a sequencememory section having stored therein a plurality of inspection andevaluation sequences for the respective devices, a sequence callingsection and a sequence setting section. The sequence calling sectioncalls, when the index for a particular device is called by the indexcalling section, the inspection and evaluation sequence for theparticular device from the sequence memory section. The sequence settingsection sets the called inspection and evaluation sequence in theinspection and evaluation section for use in inspection and evaluationof the particular device.

In order for the device inspecting and evaluating section to makecorrect inspection and evaluation, the device inspecting and evaluatingsection inspects and evaluates a particular device in accordance withthe inspection and evaluation sequence for that particular device. Whenone of the indexes is called by the index calling section, the sequencecalling section calls the inspection and evaluation sequence for thedevice indicated by the called index from the sequence memory section.The called inspection and evaluation sequence is set in the deviceinspection and evaluation section by the sequence setting section. Thus,the inspection and evaluation sequence matching the index output fromthe index output section is automatically available for the deviceinspection and evaluation section, so that appropriate inspection andevaluation can be made.

According to the present invention, the equipment inspection andevaluation system may further include a data receiving section receivingat least a part of the detailed data output from an equipment managementsystem having a data output-section. The system also includes an indexstorage control sections which stores the indexes contained in thereceived detailed data in the index memory section.

The indexes of the respective devices retrieved in the equipmentmanagement system are applied to the equipment inspection and evaluationsystem and stored in the index memory section of the equipmentinspection and evaluation system. The indexes of the devices retrievedin the equipment management system are output from the index outputsection of the equipment inspection and evaluation system.

In the present invention, the equipment may be a piping system, and thedevices inspected and evaluated or managed may be traps of differenttypes disposed the piping system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic block diagram of equipment inspection andevaluation and management systems according to one embodiment of thepresent invention.

FIG. 2 shows a configuration in a memory of an equipment inspection andevaluation system shown in FIG. 1.

FIG. 3 shows a storage configuration in a trap data memory region shownin FIG. 2.

FIG. 4 shows a conceptual configuration of a preset region shown in FIG.2.

FIG. 5 is a front elevational view of an inspection and evaluationapparatus of the inspection and evaluation system shown in FIG. 1.

FIG. 6 is a state transition diagram showing operation of a CPU to setand call trap data in and from the preset region in the memory shown inFIG. 2.

FIG. 7 shows how to operate keys on a keyboard of the inspection andevaluation system in order to set trap data of a desired trap in thepreset region, and also a form of display given in a display section ofthe inspection and evaluation system shown in FIG. 5.

FIG. 8 shows a different procedure than FIG. 7 to be employed to settrap data and a different form of display.

FIG. 9 shows how to operate keys on a keyboard of the inspection andevaluation system in order to call desired trap data stored in thepreset region, and also a form of display given in a display section ofthe inspection and evaluation system shown in FIG. 5.

FIG. 10 is a schematic representation of a steam piping system includinga bypass pipe.

FIG. 11 is a state transition diagram schematically showing operation ofthe CPU of the inspection and evaluation system to inspect and evaluatetraps and valves.

FIG. 12 shows a frame format of data transferred from the inspection andevaluation system to the management system.

FIG. 13 shows a part of data stored in the memory section of themanagement system shown in FIG. 1.

FIG. 14 shows an example of a display given when setting the referencesfor use in inspecting and evaluating traps in the management system.

FIG. 15 shows an example of a table of results of evaluation of trapsmade in the management system.

FIG. 16 is a state transition diagram schematically illustratingoperation of the CPU of the management system to set the trap inspectionand evaluation references and to analyze data of traps in accordancewith the set references.

FIGS. 17(a) and 17(b) show examples of displays for use in additionallysetting special management items into the management system, in whichFIG. 17(a) shows a list of data to be entered into the respectivemanagement items, and FIG. 17(b) shows the display displayed when datais renewed.

FIG. 18 shows a part of an example of data to be managed in themanagement system.

FIG. 19 is a state transition diagram schematically showing operation ofthe CPU of the management system to additionally set special managementitems.

FIG. 20 is a state transition diagram schematically showing operation ofthe CPU of the inspection and evaluation system to additionally setspecial management items.

FIG. 21 shows an example of display appearing on the display of themanagement system in which a steam plant piping system and icons forrespective traps in the piping system are displayed.

FIG. 22 is an example of detailed data of a particular trap selectedfrom those displayed on the display screen shown in FIG. 21.

FIG. 23 illustrates the arrangement of the display shown in FIG. 21.

FIG. 24 illustrates how to form the display shown in FIG. 21.

FIG. 25 shows the result of the processing shown in FIG. 24.

FIG. 26 is a state transition diagram schematically showing operation ofthe CPU of the management system to perform the functions shown in FIGS.21 through 25.

FIG. 27 shows an example of display for use in setting conditions in themanagement system for retrieving traps to be evaluated.

FIG. 28 shows the display displaying a result of retrieving trapsmeeting the set conditions shown in FIG. 27.

FIG. 29 illustrates how the retrieved data are re-arranged.

FIG. 30 shows retrieved data after they are re-arranged.

FIG. 31 is a flow chart illustrating operation of the CPU of themanagement system to perform the functions shown in FIGS. 27 through 30.

FIGS. 32A and 32B show a flow chart illustrating the data retrievingsteps of FIG. 31 in greater detail.

FIG. 33 is a flow chart illustrating the operation of the CPU of theinspection and evaluation system controlled in accordance with aninspection and evaluation order determined in the management system.

DETAILED DESCRIPTION OF EMBODIMENT

The present invention is described as being embodied in inspection andevaluation and management systems for steam traps, for example, withreference to FIGS. 1 through 33.

FIG. 1 is a block diagram of an inspecting and evaluating system 1 and amanagement system 2, which are coupled by a data transmission cable 3.It should be noted that the two systems are coupled to each other by thecable 3 only when data is transferred between them. Accordingly, when,for example, the inspection and evaluation system 1 is used to inspectand evaluate steam traps or other devices, or when the management system2 is used to process data about each steam trap, they are separated fromeach other by removing the cable 3.

When steam leaks through a trap (not shown), relatively high frequency,continuous ultrasonic vibrations occur in the trap. The magnitude ofvibrations, i.e. the vibration level L and the surface temperature T ofthe trap correlate to the amount of steam leakage. (The surfacetemperature T correlates to the steam pressure within the trap, and,therefore, to the amount of steam leakage.) On the basis of thecorrelation, the inspection and evaluation system 1 judges from themeasured vibration level L and temperature T whether or not steam leaksthrough particular traps, and to what extent steam leaks. For thatpurpose, the inspection and evaluation system 1 includes a probe 11 andan inspection and evaluation apparatus 12. The probe 11 detects avibration level L and surface temperature T of a particular trap. Theinspection and evaluation apparatus 12 receives and processesmeasurement signals from the probe 11 to determine whether or not steamis leaking through that trap and, if steam is leaking, to what degreethe steam leakage is.

The probe 11 has a vibration sensor (not shown) for sensing the level Lof vibrations and a temperature sensor (not shown) for sensing thetemperature T of a trap. The vibration and temperature sensors aredisposed within the probe 11 at its tip end. When the probe 11 ispressed against the surface of a trap to be inspected, the sensors sensethe vibration level L and the temperature T at the surface of the trapand outputs a vibration-representative signal and atemperature-representative signal which correspond to the sensedvibrations and temperature. The signals are coupled to the inspectionand evaluation apparatus 12 including a CPU 13 via a dedicated cable 11a.

The vibration and temperature representative signals are amplified in anamplifier 14 and, then, converted into digital signals in ananalog-to-digital (A/D) converter 15. At the output of the A/D converter15, trap inspection-result representative data of a particular trap(hereinafter referred to as trap inspection data) is provided. The trapinspection data is applied to a CPU 13, which processes informationrepresentative of the trap vibration level L and the trap surfacetemperature T contained in the trap inspection data in accordance withcorrelation data D (FIG. 3) stored in a memory 16 provided by, forexample, a ROM or RAM. The correlation data D represents correlation ofthe trap vibration level and surface temperature to the amount of steamleakage through the trap. Processing the trap inspection data D, the CPU13 judges whether or not any steam leaks from that trap and, if anysteam is leaking, to what extent steam is leaking. The results of thatjudgment are displayed on a display 17, e.g. a liquid crystal displayand also stored in the memory 16.

When the inspection of all of desired traps is completed, the inspectionand evaluation system 1 is coupled via the cable 3 to the managementsystem 2. A command is given to the CPU 13 through an operating section18 which may include plural push buttons or keys, for transferring thejudgment results to the management system 2. The judgment results aretransmitted to the management system 2 via an I/O interface 19 and thecable 3. Detailed description of data processing in the managementsystem 2 is given later.

The correlation of the amount of steam leakage to the vibration level Land surface temperature T of traps varies depending on structures oftraps to be inspected. Traps may be classified on the basis of theirprinciples of operation into disc-type traps, bucket-type traps,thermostatic (THERMO) traps, float-type traps and temperature-adjustabletraps, for example. On the other hand, even when two traps are of thesame type, they may exhibit different correlations if they aremanufactured by different manufacturers. Accordingly, for correctinspection and evaluation of traps based on such correlation, theinspection and evaluation of traps must be based on the correlation(correlation data D) for the structures or types of the particular trapsto be inspected.

For that purpose, the inspection and evaluation system 1 contains in thememory 16, a plurality of correlation data D for substantially all ofthe commercially available traps. Accordingly, regardless of the typesof traps to be inspected and evaluated, correct inspection andevaluation can be made only if the traps are commercially availableones.

The memory 16 includes a trap data memory region 161 as shown in FIG. 2.All of the available correlation data D are stored in this memory region161. In addition to the respective correlation data D, the memory region161 stores trap data including types of respective traps, company codesindicating companies which manufactured the respective traps, theoperating principles of the traps etc.

Each trap is assigned with its own number including, for example, fourdigits, which is referred hereinafter to as the trap code. In the trapdata memory region 161, the respective trap data including thecorrelation data D are arranged on the basis of their trap code in atrap code list as shown in FIG. 3.

There are more than 2,000 models of traps in each of the types. The trapdata memory region 161 stores trap data and, hence, correlation data D,of as many as more than 2,000 traps. In order to inspect and evaluateone trap, it is necessary to find out one correlation data D out of morethan 2,000 correlation data D stored in the memory region 161. It is noteasy to locate only the desired one in so much data.

According to the present invention, as shown in FIG. 2, the memory 16includes a region referred to as the preset region 162, separate fromthe trap data memory region 161. In the preset region 162, data of onlydesired ones of the traps, e.g. only those traps which are to beinspected and evaluated by the inspection and evaluation system, arestored beforehand or preset. The traps for which data are stored in thepreset region 162 may be, for example, traps in a steam plant to beinspected and evaluated.

In the actual inspection and evaluation procedure, trap data includingcorrelation data D of a particular trap is called from the data storedin the preset region 162. With this arrangement, the range from whichdesired data is to be found can be narrower.

Writing of trap data into the preset region 162 and calling or readingdesired trap data from the preset region 162 is carried out by the CPU13 in accordance with a key entry through the data entry section 18. TheCPU 13 also causes a message based on the key entry to be displayed onthe display 17.

Control programs according to which the CPU 13 operates are stored in acontrol program region 163 in the memory 16. In the illustratedembodiment, the control program region 163 is in a ROM configuration.The trap data memory region 161 and the preset region 162 are of a RAMconfiguration.

FIG. 4 is a conceptual representation of the structure of the presetregion 162. The preset region 162 includes a plurality, e.g. six, ofpartitioned memory sub-regions 162 a, each for one of the six traptypes, namely, the disc-type, the bucket-type, the thermostatic type,the float-type, the temperature-adjustable type, and other types. Eachof the sub-regions 162 a includes a plurality, e.g. 30, of smallermemory regions 162 b. Trap data for one trap model is stored in eachsmaller memory region 162 b. Thus, in the example shown in FIG. 4, trapdata of thirty (30) trap model of each type can be stored in eachsub-region 162 a.

As previously stated, commands for writing and reading desired trap datain and from the preset region 162 are give through the data entrysection 18. The keys on the data entry section 18 are arranged as shownin FIG. 5 which is a front view of the inspection and evaluationapparatus 12. The keys are sorted into a power switch key group 181, afunction key group 182, a trap type selecting key group 183, and anumerical key group 184. The display 17 is disposed in the top portionabove these key groups, and may be a liquid crystal display panel whichcan display a message in, for example, two rows. The inspection andevaluation apparatus 12 is generally rectangular and has such a sizethat it can be held by hand. The inspection and evaluation apparatus 12has an input terminal 12 a at the top end surface for connecting theapparatus 12 to the probe 11 via the cable 11 a.

Next will be described, how to manipulate the keys on the data entrysection 18 and how the CPU 13 operates for writing desired trap datainto the preset region 162, using the trap codes, with reference toFIGS. 6 and 7.

FIG. 6 is a state transition diagram showing the operation of the CPU 13when trap data is written in and read from the preset region 162. FIG. 7illustrates the sequence of operating the keys on the data entry section18 for writing trap data into the preset region 162, and also themessages on the display 17.

First, an ON key in the power switch group 181 is pressed. Uponactuation of the ON key, the CPU 13 checks itself with respect to itspredetermined functions in about three seconds and places itself in anidling mode M2 as shown in FIG. 6. In the idling mode M2, the CPU 13awaits a command from the data entry section 18, and also causes thedisplay 17 to display a three-digit number and a five-digit number in anupper row, and “MODEL” in a lower row, as shown in FIG. 7, Part (a). Thethree-digit number in the upper row in the display 17 is an “areanumber” representing the area of a steam handling plant where aparticular trap is located. The five-digit number in the lower row is a“trap number” given to each trap to be inspected and evaluated. Bothnumbers are arbitrarily assigned by a person who manages the traps, but,in this stage, no more description about them is given since they do notparticipate in writing and reading trap data in and from the presetregion 162.

Next, the type of the trap is selected by pressing an appropriate key inthe trap type selecting key group 183. Then, the CPU 13 enters into amodel writing mode M4 and causes the display 17 to display, after theindication of “MODEL” in the lower row, a two-digit number and a traptype selected through the trap type selecting key 183, as shown in FIG.7, Part (b). FIG. 7, Part (b) shows that the “FLOAT” key in the traptype key group 183 was pressed. If it is desired to change the trap typeto another type from the FLOAT type, the key for the desired type ispressed.

The two-digit number in the lower row shown in FIG. 7, Part (b) is thenumber of one of the thirty smaller memory regions 162 b in thesub-memory region 162 a for the selected trap type of the preset region162. The smaller memory regions 162 b are numbered from 00 through 30.

Keys with arrows “↑” and “↓” indicated on their surfaces in the functionkey group 182 are pressed to enter one of numbers 00 through 30corresponding to a desired smaller memory region. In other words, one ofthe smaller memory region 162 b in which to store desired trap data isselected by operating the “↑” and “↓” keys. For example, the “↑” key maybe pressed once to select a first smaller memory region numbered “01”,which may be referred to as memory number. In this case, the messagedisplayed is as shown in FIG. 7, Part (c). Below the memory number (orin the first digit of the memory number) on the display 17, a cursor 17a blinks, indicating that the digit can be changed. It should be notedthat the memory number “00” does not represent a smaller memory region162 b, but it is a kind of message to indicate that the CPU 13 is now inthe model writing mode M4. Therefore, no trap data can be written inthis memory number “00”.

After selecting the memory number, numeral keys are used to enter thetrap code of a trap of which trap data should be written, beginning withthe digit in the highest position toward the digit in the lowestposition, e.g. from the thousands digit, the hundreds digit, the tensdigit down to the units digit. When the thousands digit is entered, theCPU 13 enters into a trap code entry mode M6. The message on the display17 displayed when the thousands digit of, for example, “1” is entered isshown in FIG. 7, Part (d). It is seen that the cursor 17 a, too, hasmoved to the position below the thousands digit.

When four digits forming a trap code have been all entered in the trapcode entry mode M6, the CPU 13 returns to the model writing mode M4.

The trap code for a particular trap can be known from a table containingtrap codes shown in relation to corresponding trap models.

After entering the trap code, the CPU 13 checks the entered trap codewith trap data stored in the trap data memory region 161 and finds outwhether or not trap data for the respective trap codes are present inthe trap data memory region 161. If it is found that the trap data ispresent, the CPU 13 checks if the trap corresponding to the entered trapcode is of the initially entered trap type (entered in the state shownin FIG. 7, Part (b)), i.e. whether the trap is a float type trap. If thetrap type is the correct one, the CPU 13 makes a trap modelcorresponding to the entered trap code displayed on the display 17. FIG.7, Part (e) shows an example in which a trap model “J3X-2” is displayedon the display 17 corresponding to a entered trap code “1000”.

Then, when the CPU 13 is in the state shown in FIG. 7, Part (e), an“ENT” key in the numeral key group 184 is pressed, the CPU reads thetrap data corresponding to the entered trap, i.e. the trap data for thetrap of which the model is “J3X-2” in the illustrated example, from thetrap data memory region 161. The read trap data is written in the firstmemory region 162 b. Then, the message on the display 17 changes to amessage indicating that the writing of the trap data has been finished.This message is shown in FIG. 7, Part (f). The CPU 13 returns to theidling mode M2.

Alternatively, the trap data can be written by pressing the “↑” and “↓”keys when the apparatus is in the state shown in FIG. 7, Part (e). Inthis case, upon pressing the arrowed key, the message on the display 17returns to the state shown in FIG. 7, Part (c).

Further, if it is desired in the state shown in FIG. 7, Part (e) toalter the trap to be written, the trap code for the desired trap isentered by pressing appropriate numerical keys, which returns theapparatus 12 to the state shown in FIG. 7, Part (d).

In the state shown in FIG. 7, Part (d), if no trap data corresponding tothe entered trap code is found in the trap data memory region 161, or ifthe trap type corresponding to the entered trap code is not theinitially selected trap type even when the trap data is found in theregion 161, the CPU 13 returns to the state shown in FIG. 7, Part (c),as shown in FIG. 7, Part (g). In such a case, a correct trap code shouldbe entered.

In the state of FIG. 7, Part (g), if, for example, the “ENT” key ispressed, the writing of trap data into the first trap memory region 162b or the renewal of trap data in the first memory region 162 b is notdone.

According to the data writing method thus far described with referenceto FIG. 7, a trap code of a desired trap is entered directly by pressingkeys on the keyboard. However, if one does not know the trap code of thedesired trap, he or she must find it out from the previously describedtrap code list. According to the illustrated example, in addition to thetrap code entry method, a trap model retrieving and entering method isalso employed. In the trap model retrieving and entering method, a trapmodel of the desired trap is retrieved, and the trap data for thedesired trap is written on the basis of the retrieved trap model. Thetrap model retrieving and entering method is described in detail withreference to FIGS. 6 and 8.

The states illustrated in FIG. 8, Parts (a) through (c) are similar tothe states shown in FIG. 7, Parts (a) through (c). When the messageshown in FIG. 8, Part (c) is displayed, the CPU 13 is in the modelwriting mode M4. In the mode M4, when a retrieval key is pressed, theCPU 13 enters into a manufacturer selection mode M8 as shown in FIG. 6.In the illustrated inspection and evaluation apparatus 12, there is nokey named “retrieval key”, but a key labeled “INFORMATION” in thefunction key group 182 is used as the retrieval key. At the same timethe retrieval key or “INFORMATION” key is pressed, the message on thedisplay 17 changes to the one shown in FIG. 8, Part (d). Specifically,words “COMPANY CODE” are displayed in the upper row, and a company codeconsisting of, for example, one digit, as well as the correspondingcompany name is displayed in the lower row. In the illustrated example,a company code “0” and its corresponding company name “ABC” aredisplayed.

The manufacturer selection mode M8 is a mode for selecting themanufacturer of a trap whose trap data is to be written. Themanufacturer is selected by pressing one of the “↑” and “↓” keys. Whenone of the “↑” and “↓” keys is pressed, the number or company code belowwhich the cursor 17 a is blinking changes (increases or decreases), andthe company name also changes.

After a manufacturer is selected in the manufacturer selection mode M8,the CPU enters into a model selection mode M10, in which the model of adesired one of the traps manufactured by the selected manufacturer isselected. Specifically, the “ENT” key is pressed when the display is asshown in FIG. 8, Part (d), and the CPU 13 enters into the mode M10. Thiscauses a display shown in FIG. 8, Part (e) to be displayed. The trapshown in FIG. 8, Part (e) is, for example, a float type trap, ModelJ3X-2 manufactured by ABC Company.

Different from the previously described trap code entry method, the trapmodel retrieving and entering method enables an operator to write trapdata for a desired trap even if he does not know the trap code.Accordingly, he need not use the trap code list.

Next, referring to FIGS. 5 and 9, how to read out trap data written inthe respective smaller memory regions 162 b of the preset region 162 ofthe memory 16.

As is seen, what are shown in FIG. 9, Parts (a) through (c) are the sameas those shown in FIG. 7, Parts (a) through (c), or in FIG. 8, Parts (a)through (c). It should be noted that in FIG. 9, Part (c), different fromFIG. 7, Part (c) and FIG. 8, Part (c), a message “J3X-2” is displayed inthe portion of the lower row of the display 17 following the message“MODEL 01”. This is because the trap data for a Model “J3X-2” trap hasbeen already written in the smaller memory region 162 having the memorynumber “01”. As described previously, when the display 17 is in thestate shown in FIG. 9, Part (c), the CPU 13 is in the model writing modeM4. However, it should be note that when the CPU 13 is in the mode M4,it is also in a model reading mode M12 for reading or calling trap datafor a desired trap.

In the state shown in FIG. 9, Part (c), i.e. in the model reading mode12 shown in FIG. 6, the “ENT” key is pressed after the smaller memoryregion 162 b where trap data for the desired trap is stored is selectedby pressing one of the arrowed keys. In FIG. 9, Part (c), the selectedsmaller memory region 162 b is the first region numbered “01” where thetrap data for the Model “J3X-2” trap is contained. When the “ENT” key ispressed, the trap data stored in the selected smaller memory region iscalled, and the model of the trap of which the trap data has been calledis displayed on the display 17, as shown in FIG. 9, Part (d). In thecase of FIG. 9, Part (d), the trap data for Model “J3X-2” trap has beencalled. An operator can know the trap type and model of a trap to beinspected since they are indicated on a plate attached to the traphousing.

When the trap data is called, the CPU 13 returns to the idling mode M2.Then, the trap which is Model “J3X-2” is inspected and evaluated inaccordance with the called trap data, which results in preciseinspection and evaluation.

As described above, according to the present invention, trap data foronly those ones, out of a number of traps, which are immediately to beinspected can be selectively stored in the preset region 162. When aparticular trap is to be inspected, first the type of that trap isselected, and desired trap data is selected from the trap data for theselected trap type. Thus, it is easier to call desired trap data thancalling it from the trap data for all the models of all the types.

In the illustrated example, the maximum number of trap data that can bestored in the preset region for each trap type is thirty (30). The valueof thirty is employed for the following reason. Usually, onesteam-utilizing plant uses from about 10 to about 20 trap models at mostfor each trap type. Accordingly, thirty smaller memory regions 162 b foreach trap type can handle almost any plant. However, the number of thesmaller memory regions 162 b is not limited to thirty.

In the above-described example, the preset region 162 in which trap dataare stored is divided into a plurality of sub-regions 162 a each for onetrap type. The preset region 162 may be divided on a different basis,e.g. on a manufacturer basis.

Furthermore, the method for writing and calling trap data in and fromthe preset region 162 is not limited to the described ones. For example,it may be arranged that only the capital letter of the model name of adesired trap may be used to retrieve the model of that trap (i.e.forward matching search) to find out the trap model. Using this trapmodel, the trap data is written or called.

A steam piping system may include one or more assemblies each includinga main pipe 4 and a bypass pipe 5, like the one shown in FIG. 10. When atrap 41, for example, disposed in the main pipe 4 may fail, leakingsteam, it should be repaired or replaced. In such a case, the bypasspipe 5 is used to bypass the trap 41 so that steam flow between twopoints on opposite sides of the trap 41 can be maintained. The bypasspipe 5 includes a bypass valve 51 for controlling the flow of steamthrough the pipe 5. Valves 42 and 43 are disposed on opposite sides ofthe trap 41 for controlling the flow of steam through the trap 41.

If the trap 41 can operate normally, the valves 42 and 43 are openedwith the bypass valve 51 closed, so that steam can flow through the trap41 as indicated by a dash-and-dot line arrow 4 a. When the trap 41fails, the valves 42 and 43 are closed, and the bypass valve 51 isopened. Then steam can detour through the bypass pipe 5 as indicated bya broken line arrow 5 a. In this case, though drainage of condensate bythe trap 41 is not available, at least the flow of steam can bemaintained, so that the repairing or replacement of the trap can be donewithout need for stopping the operation of the plant.

If, however, the bypass valve 51 is broken and steam leaks from it, theoperating efficiency of the plant decreases regardless whether or notthe trap 41 operates normally. Accordingly, it is necessary to inspectnot only the trap 41 in the main pipe but also the bypass valve 51.

The equipment inspection and evaluation system 1 according to thepresent invention has a valve inspecting and evaluating function, too.It is known that steam leaking through the valve 51 produces ultrasonicvibrations in the bypass valve 51, as in the case of traps. Accordingly,measuring the vibration level in the valve 51, it is possible todetermine whether or not steam is leaking through the valve 51.

Vibrations in the valve 51 can be sensed by pressing the vibrationsensor at the tip end of the probe 11 against the surface of the valvehousing. The magnitude or level of the vibrations can be derived fromthe data obtained by sensing the vibrations. The system includes a valveinspection and evaluation program memory region 164 in the memory 16 inwhich a valve inspection and evaluation program is stored. According tothis program, the vibration level is displayed on the display 17 andalso temporarily stored in the memory 16. The valve inspection andevaluation program is executed in the CPU 13 to judge whether or not thebypass valve 51 fails, e.g. whether or not steam is leaking.

When the tip end of the probe 11 is pressed against the surface of thevalve 51, not only the vibrations but also the temperature at thesurface of the valve 51 is detected. The valve inspection and evaluationprogram processes the temperature data from the probe 11 to derive thetemperature of the valve 51. The temperature is displayed on the display17 and stored in the memory 16, together with the vibration level. Thus,an operator can know whether or not the bypass valve 51 fails, and alsothe surface temperature of the valve 51.

It should be noted that when the equipment inspection and evaluationsystem of the present invention is used, it is necessary to choose oneof the trap inspection and evaluation program and the valve inspectionand evaluation program depending on the device to be inspected andevaluated. If the trap 41 is to be evaluated, the trap inspection andevaluation program must be executed, and if it is the valve 51 that isto be evaluated, the valve inspection and evaluation program must bechosen. For that purpose, the inspection and evaluation system accordingto the illustrated embodiment is arranged such that the inspection andevaluation program can be manually switched through the data entrysection 18.

In addition to this manual switching mode, the system according to theillustrated embodiment of the present invention can be operated in anautomatic switching mode. In the automatic switching mode, the trapinspection and evaluation program and the valve inspection andevaluation program are automatically switched in such a manner that apredetermined number, e.g. one, of traps 41 and the same number ofvalves 51 can be alternately evaluated. The selection of the programscan be done through the data entry section 18.

Now, operation of the CPU 13 of the inspection and evaluation system 1according to the illustrated embodiment for inspecting and evaluatingtraps 41 and bypass valves 51 is described with reference to FIG. 11.FIG. 11 is a state transition diagram conceptually illustratingoperation of the CPU 13, which operates in a manner illustrated in thestate transition diagram of FIG. 11 in accordance with the programs. InFIG. 11, a trap inspection and evaluation mode M20 is a mode in whichthe CPU 13 processes inspection data including vibration-representativedata and temperature-representative data provided by the probe 11 inaccordance with the trap inspection and evaluation program, i.e. thecorrelation data D for the traps 41 to be inspected and evaluated. In avalve inspection and evaluation mode 30, the CPU 13 processes theinspection data in accordance with the valve inspection and evaluationprogram.

When the inspection and evaluation apparatus 12 is powered by pressingthe ON key in the power switch key group 181, the CPU 13 checks itselfin accordance with a predetermined procedure and, after that, entersinto an idling state 100.

The term “idling state 100” used herein means substantially the same asthe idling mode M2 in the state transition diagram shown in FIG. 6. Inthe idling state 100, the CPU 13 awaits a command and is ready forinspection and evaluation of a trap 41 or a valve 51. It should be notedthat in the idling state 100 immediately after the apparatus 12 isturned on, the CPU 13 is in the trap inspection and evaluation mode M20and is ready for inspecting and evaluating a trap 41. In addition,immediately after the turning on of the apparatus 12, the CPU 13 isalways placed in the manual switching mode. Also, in the idling state100, the CPU 13 displays a message on the display 17, indicating thatthe CPU 13 is in the idling state 100, in the trap inspection andevaluation mode M20, and in the manual switching mode.

Let it be assumed that the CPU 13 is to evaluate a trap 41 immediatelyafter the inspection and evaluation apparatus 12 is turned on. When theprobe 11 is pressed against the surface of the housing of a trap to beevaluated, a measurement starting switch (not shown) on the probe 11 isturned on, and the probe 11 starts measuring the level of ultrasonicvibrations and surface temperature of the trap 41. At the same time, theCPU 13 enters into a measuring step 200.

In the measuring step 200, the CPU 13 causes the display 17 to display amessage that the ultrasonic vibration level and surface temperature ofthe trap 41 are being measured. It will take some time to preciselymeasure physical quantity of ultrasonic vibrations and temperature ofthe trap 41. Thus, the probe 11 may be urged against the trap 41 for,for example, about fifteen seconds.

After the measurements of vibrations and temperature, the CPU 13 entersinto a judgement step 300, in which the CPU 13 processes the inspectiondata, i.e. data relating to the ultrasonic vibrations and temperature ofthe trap 41 in accordance with the trap inspection and evaluationprogram, using the correlation data D. By this processing, whether ornot there is any steam leakage and, if any, to what extent the steamleakage is, are automatically made. The judgment made is displayed onthe display 17 and also temporarily stored in the memory 16.

After the judgment step 300 is completed, the CPU 13 returns to theidling state 100, so that it is ready for inspecting and evaluatinganother trap 41. For inspection and evaluation of another trap 41, theprobe 11 is pressed against the trap 41.

If a bypass valve 51 is to be evaluated instead of a trap 41, a key onthe data entry section 18, e.g. the “ENT” key in the numerical key group184, may be pressed once. This makes the CPU 13 shift into the valveinspection and evaluation mode M30 from the trap inspection andevaluation mode M20 and is ready for inspection and evaluation of a trap51. At the same time, the display 17 displays a message indicating thatthe CPU 13 changes its mode from the trap inspection and evaluation modeM20 to the valve inspection and evaluation mode M30.

Similar to the inspection and evaluation of the trap 41, for inspectingand evaluating the bypass valve 51, the probe 11 is urged against thevalve 51 to be evaluated, which automatically initiates the inspectionand evaluation of the valve 51. Specifically, the CPU 13 producesvibration data and temperature data from the measurement in themeasurement step 200, and processes the vibration and temperature datain accordance with the valve inspection and evaluation program todetermine the vibration level and surface temperature of the bypassvalve 51 in the judgment step 300. The vibration level and temperatureare displayed and temporarily stored in the memory 16.

After the judgment step 300, the CPU 13 automatically returns to theidling state 100 and becomes ready for the next valve inspection andevaluation. Accordingly, if another bypass valve 51 should be inspectedand evaluated, the probe 11 is urged against the valve surface, and thesame procedure is repeated. On the other hand, if an operator wants toinspect and evaluate a trap 41, he presses the “ENT” key once, so thatCPU 13 shifts from the valve inspection and evaluation mode M30 to thetrap inspection and evaluation mode M20.

As described above, in the manual switching mode, by pressing the “ENT”key when the CPU 13 is in the idling state 100, the inspection andevaluation mode of the CPU 13 can be switched between the trapinspection and evaluation mode M20 and the valve inspection andevaluation mode M30. In other words, in the manual switching mode,unless the “ENT” key is pressed when the CPU 13 is in the idling state100, the inspection and evaluation mode currently employed is notswitched to the other. This feature is useful for successivelyinspecting and evaluating either of traps 41 and valves 51.

However, in order to alternately evaluate combinations of trap 41 andbypass valve 51, the inspection and evaluation mode is also alternatelyswitched between the trap inspection and evaluation mode M20 and thevalve inspection and evaluation mode M30 by pressing the “ENT” key anumber of times, which is a very troublesome operation.

Accordingly, for alternately inspecting and evaluating traps 41 andbypass valves 51, the previously stated automatic switching mode is usedto operate the CPU 13. According to the illustrated embodiment, theswitching between the manual switching mode and the automatic switchingmode is done by pressing a “FUNC” key in the function key group 182followed by pressing a “5” key.

When the CPU 13 is set to operate in the manual switching mode, it canbe changed to the automatic switching mode when the “FUNC” key and the“5” key are successively pressed in the named order in the idling state100. A message indicating that the switching mode of the CPU 13 has beenchanged to the automatic switching mode is displayed on the display 17.

It should be noted that in the automatic switching mode of the CPU 13,too, if the “ENT” key is pressed when the CPU 13 is in the idling state100, the inspection and evaluation mode can be switched between the trapinspection and evaluation mode M20 and the valve inspection andevaluation mode M30.

Let it be assumed that the CPU 13 is in the automatic switching mode andthat the inspection and evaluation mode in which the CPU 13 is in is thetrap inspection and evaluation mode M20. Also assume that a trap 41 isfirst evaluated. First, the probe 11 is pressed against the surface ofthe housing of the trap 41, and, the CPU 13 proceeds with themeasurement step 200 and the judgment step 300 of the trap inspectionand evaluation mode M20 for inspecting and evaluating the trap 41. Whenthe judgment step 300 is finished, the CPU 13 shifts to the valveinspection and evaluation mode M30 and returns to the idling state 100.

Then, the CPU 13 is ready for inspecting and evaluating a bypass valve51. The probe 11 is pressed against the surface of the housing of thevalve 51 to be evaluated, the CPU 13 proceeds with the measurement step200 and the judgment step 300 of the valve inspection and evaluationmode M30 for inspecting and evaluating the valve 51. After performingthe judgment step 300, the CPU 13 shifts to the trap inspection andevaluation mode M20 and returns to the idling state 100.

Thus, in the automatic switching mode, the CPU 13 automatically shiftsto one of the trap inspection and evaluation mode M20 and the valveinspection and evaluation mode M30 after it performs the inspection andevaluation in the other mode. Therefore, when the automatic switchingmode is used for alternately inspecting and evaluating pairs of a trapand a bypass valve, there is no need for manually switching theswitching mode alternately. As described above, if, in the automaticswitching mode, it becomes necessary to successively evaluate two traps41 or two valves 51, the “ENT” key is pressed when the CPU 13 is in theidling state 100, which can switch the inspection and evaluation modefrom one mode to the other.

In the above-described example, the inspection and evaluation mode isswitched from one to the other each time one trap or valve is evaluated.For example, each time two or more traps 41 or valves 51 are evaluated,the inspection and evaluation mode can be switched from, or to, the trapinspection and evaluation mode M20 to, or from, the valve inspection andevaluation mode M30. The number of devices to be evaluated each time maybe changed.

In the above-described example, only the bypass valve 51 is evaluated inaccordance with the valve inspection and evaluation program, but thevalves 42 and 43 in the main pipe 4 may also be evaluated in accordancewith the same valve inspection and evaluation program.

When the desired inspection and evaluation of the devices, such as trapsand valves, have been completed, the evaluation results are transferredto the management system 2 by connecting the equipment inspection andevaluation system 1 to the management system 2 by, for example, anRS-232C data transmission cable 3.

A command is given through the data entry section 18 to the CPU 13 inthe inspection and evaluation system 2 to transfer the evaluationresults, and, in response to it, the CPU transfers the evaluationresults via the I/O section 19 and the cable 2 to the management system2.

Referring to FIG. 12, data transferred from the inspection andevaluation system 1 to the management system 2 is generally described.

In FIG. 12, “Judgment Code” represents data representative of theevaluation results. The evaluation results are encoded into 2-bytedecimal data, for example. In addition to the evaluation resultrepresentative data, the data to be transferred includes the areanumber, the trap number, the trap model, the trap type, the date ofinspection of a trap, the application, the operational steam pressure,the importance (Priority), the management data (User Original Code)described later, etc.

The data shown in FIG. 12 is data of one trap. Accordingly, if ten trapsare inspected and evaluated, data of the ten traps are successivelytransferred in a frame format similar to the one shown.

In FIG. 12, the codes “STX”, “Check Sum”, “ETB” and “CR” are knowncontrol codes for use in digital data communications protocols, anddenote “start of transmission”, “check sum”, “end of transmission” and“carriage return”, respectively.

Examples of the evaluation results provided by the inspection andevaluation system 1 are as follows.

The inspection and evaluation system 1 or its CPU 13 judges whether ornot there is any steam leakage, and, if there, judges the degree ofleakage. For a trap having heavy steam leakage, i.e. a blowing trap, adisplay of “Blowing” is displayed on the display 17. Depending on thedegree of steam leakage less than “Blowing”, a display of “Leak/Large”,“Leak/Medium” or “Leak/Small” is displayed for a large steam leakagetrap from which the amount of steam leakage large, a medium steamleakage trap from which the amount of steam leakage is medium, and asmall steam leakage trap from which the amount of steam leakage issmall, respectively. If it is judged that traps are almost in aninoperative state, a display of “Blocked” is given on the display 17. Ifdrainage of condensate is incomplete, so that condensate stays in thetrap, which decreases the temperature of the trap, the inspection andevaluation system 1 detects it and provides a message of “Low Temp” onthe display 17. Further, if a trap to be inspected and evaluated is of atemperature adjustable type, and if the temperature is outside thepreset temperature range, the system 1 detects it and causes a messageof “Fail Adjust” to be displayed. If nothing is judged wrong in thetraps, a display of “Good” is displayed.

An experienced operator may locate from his experience where in the trapsteam is leaking, from a trap body, a trap lid, a gasket or some otherpart. The inspection and evaluation system 1 according to theillustrated embodiment is arranged such that in addition to theevaluation results, information relating to the location where steam isleaking can be manually entered through the data entry section 18. Ifsteam is leaking through the trap body, a display of “Leak/Body” isdisplayed, and if steam is leaking due to malfunctioning of a gasket, amessage of “Leak/Gasket” is displayed.

For traps which have not inspected yet or for traps which are notoperating, information representing it can be manually input in place ofinspection results, and a message “Not Inspected Yet” or “Not inService” is displayed.

As shown in FIG. 1, the management system 2 includes a CPU 21, a dataentry section 22, including, for example, a keyboard and a mouse,connected to the CPU 21, a display 23, e.g. a cathode ray tube or aliquid crystal display, a memory 24 including a ROM and a RAM, and anI/O circuit 25. In terms of hardware, the management system 2 may beprovided by, for example, a personal computer.

The memory 24 stores therein detailed data of respective traps. Detaileddata include, for example, an area number indicating where a particulartrap is disposed in the plant, a trap number, a trap model name, amanufacturer, an application or use of the trap, a steam pressure(operational pressure), and the priority of each trap. The memory 24also stores therein a management program for providing arithmeticoperations on and analyzing data transmitted from the inspection andevaluation system 1 for use in managing the plant and respective traps.The management program is provided for the memory 24 from a recordmedium (not shown), e.g. a flexible disc, a hard disc, a magnetic tape,a CD-ROM, a magneto-optical disc, a DVD and a paper tape.

Data sent from the inspection and evaluation system 1 through the cable1 is applied through the I/O circuit 25 to the CPU 21, which, then,stores it in the memory 24. When storing data from the inspection andevaluation system 1 in the memory 24, the CPU 21 arranges data of trapswhich have been already stored in the memory and data from the system 1in a list like the one shown in FIG. 13. In the list, the respectivedata are re-arranged on the basis of the area numbers and the trapnumbers. The CPU 21 provides arithmetic operations on and analyzes thedata stored in the memory 24 in accordance with the management program,to compute the number of defective traps, the percent defective, theloss caused by steam leakage from the defective traps, etc. The analysismay be displayed on the display 23, stored in the memory and/or outputto peripheral apparatuses (not shown), such as a printer.

From the analysis of the data made by the management system 2, a personoperating the plant can grasp the operation states and efficiencies ofindividual traps in the plant. He can foresee traps which will requirerepairing or replacement and, therefore, can achieve appropriatemaintenance of the plant and traps.

What state of traps should be judged defective or which traps should berepaired or replaced may differ from person to person who runs plants.For example, even when steam is leaking through a trap, no adverseeffect may be given to products manufactured by a plant in which thesubject trap is used, though the operating efficiency of the plantdecreases. Accordingly, one person may, but another may not, want tojudge defective those traps for which the amount of steam leakage ismedium or small, or may not want to judge them as ones which requirerepairing or replacement. Basically, the criteria according to whichtraps are judged defective, repaired or replaced should be set by plantmanagers.

This criteria setting can be realized by the management system 2 of thepresent invention. The CPU 21 of the management system 2 operates in thefollowing manner in accordance with the management program.

Prior to providing arithmetic operations and analysis on the data, theCPU 21 first causes the display 23 to display a picture like the oneshown in FIG. 14. Using the picture, an operator can choose anddetermine which evaluation items respective traps should meet in orderfor them to be judged defective. A thick arrow 23 a displayed in theupper left portion is a cursor, which can be freely moved over thescreen by a mouse.

Squares 61 are displayed in front of respective evaluation items, suchas “Blowing”, “Leak/Large”, “Leak/Medium”, “Leak/Small”, “Blocked”, “LowTemp”, “Fail Adjust”, “Leak/Body” and “Leak/Gasket”. If traps evaluatedas any one of these items should be deemed defective, a check mark isattached in the square 61 before an appropriate item. In addition, themanagement system 2 is arranged such that an operator can add his or herown judgment item, which can be chosen by marking the square before thedisplay of “Custom Code”.

For setting the management system 2 so as to judge a “Blowing” trap asdefective, the square 61 in front of the indication “Blowing” is markedwith a check by moving the cursor 23 a and pressing the left side buttonon the mouse.

The picture in FIG. 14 shows a setting for judging the following trapsdefective: traps from which steam is blowing (Blowing traps), traps fromwhich steam is not blowing but is leaking in a relatively large amount(Leak/Large traps), traps which are blocked (Blocked traps), traps forwhich the temperature is too low (Low Temperature traps), traps failingto adjust temperature (Fail Adjust traps), traps having a body throughwhich steam is leaking (Leak/Body traps) and traps having a gasketthrough which steam is leaking (Leak/Gasket traps).

Traps which have not been inspected yet, hereinafter referred to asnon-inspected traps, and traps which are not being used, hereinafterreferred to as not-in-service traps, can be categorized as defectivetraps. For that purpose, items “Not Inspected Yet” for non-inspectedtraps and “Not in Service” for not-in-service traps are displayed withsquares 62 before them. If the square 62 before “Not-Inspected-Yet” or“Not-in-Service” is marked with a check mark, non-inspected traps ornot-in-service traps are judged defective.

In order to cancel the setting, the cursor 23 a is moved to the markedsquare in front of a desired item, and the left button on the mouse isclicked.

After checking the judgment items for judging defective traps, thecursor 23 a is moved to click a button 63, “OK”, in the upper rightportion of the screen. Then, the CPU 21 treats only those traps whichfall in the categories marked with a check, and treats those traps whichfall in the unmarked categories as good or normal traps.

The evaluation results shown in FIG. 13 are analyzed to determine whichtraps are good and which traps are defective according to the criteriashown in FIG. 14. The results of judgment are shown in the list in FIG.15. The trap having a trap number of “00005” evaluated as “Fail Adjust”and the trap having a trap number of “00007” evaluated as “Leak/Large”are judged to be defective. However, the traps having trap numbers of“00003” and “00009” evaluated as “Leak/Medium” and “Leak/Small”,respectively, are judged “good”. In FIG. 15, numerals in the column“Loss ($)” indicate losses in dollar incurred due to steam leakage.

If a button 64 labeled “Default” in the display shown in FIG. 14 ispressed or clicked, the CPU 21 automatically sets standard criteria. Forexample, in the “Default”, the CPU 21 adds a check mark in the squares61 in front of “Blowing”, “Leak/Large”, “Leak/Medium”, “Leak/Small”,“Blocked”, “Low Temp”, “Fail Adjust”, “Leak/Body” and “Leak/Gasket”.Then, all the traps that fall in these categories are treated asdefective traps.

When an operator presses or clicks a button 65 labeled “Cancel”, thedisplay on the screen is cancelled.

If a button 66 labeled “Help” is clicked, a help display containingexplanations about the displayed items are given.

The operation of the CPU 21 for setting the judgment criteria andproviding arithmetic operations on and analysis of data according to thecriteria is shown in FIG. 16.

The CPU 21 first enters in an idling state 101, in which the CPU 21causes a menu to be displayed on the display 23. An operator can setwhat kind of operation and analysis should be used.

The operator gives a command through the data entry section 22 todisplay the picture shown in FIG. 14. Then, the CPU 21 shifts to aselecting step 102 and the picture shown in FIG. 14 is displayed on thedisplay 23. In the selecting step 102, the mouse is used to choosedesired ones of the evaluation items by marking appropriate ones of thesquares 61 and 62.

After the selection of the desired evaluation items, i.e. the setting ofthe judgment criteria, the CPU moves to a renewal step 103, in which theset criteria are stored. Then, the CPU 21 returns to the idling state101.

In this state, when an operator gives a command to the CPU 21 throughthe data entry section 22 to start arithmetic operations and analysis ofdata, the CPU moves into an analyzing step 104. In the analyzing step104, trap judgment based on the set criteria as stored in the renewalstep 103 is carried out. The judgment results are displayed in the formshown, for example, in FIG. 15 on the display 23. The judgment resultsmay be used to compute percent defective and other desired data. Afterthe analysis in the analyzing step 104 is completed, the CPU 21 returnsto the idling state 101.

If the “Default” button 64 is pressed when the CPU 21 is in theselecting step 102, the CPU 21 shifts into a standard criterion settingstep 105, and the standard criteria described previously are set. Afterthat, the CPU 102 returns to the selecting step 102.

If the “Cancel” button 65 is pressed when the CPU 21 is in the selectingstep 102, the CPU 21 returns directly to the idling state 101.

If the “Help” button 66 is pressed or clicked when the CPU 21 is in thestep 102, the CPU 21 moves to a helping step 106 and causes the helpdisplay to be displayed. If a command to end the help display is appliedto the CPU 21 in the helping step 106, the CPU 21 returns to theselecting step 102.

As described above, in the management system 1 according the illustratedembodiment of the present invention, criteria for the judgment of theperformance of traps evaluated by the inspection and evaluation system 2can be freely set so that traps can be managed in any manners desired byplant running individuals.

The control sequence for the CPU 21 is not limited to the one shown inFIG. 16, but other suitable control sequences may be used.

Data of traps to be managed by the management system 2 are stored in thememory 24 in the form of a list in which traps are arranged, forexample, on an area number and trap number basis, as shown in FIG. 13.The person running a particular plant may want to add some managementitems for better management of the traps. Such additional managementitems may include, for example, names of persons supervising particulartraps and company names maintaining particular traps. According to oneembodiment of the present invention, such special management items canbe added for better management.

The management program includes a program for adding special managementitems. The CPU 21 operates in the following manner in accordance withthe management program to add management items.

First, a command to notify the CPU 21 that a special management item isto be added is entered through the keyboard. In response to thiscommand, the CPU 21 displays a picture like the one shown in FIG. 17(a)on the display 23, which is used to add a desired management item.

The picture in FIG. 17(a) includes a message 71 of “User 1”, which is afirst management item the user or the person who is running a particularplant desires to add, and a list 72 containing items labeled “Code”,“Name” and “Comments”, respectively. “Name” may be a name of a person orof anything assigned to “Code”, and “Comments” are comments on each“Name”. When the picture of FIG. 17(a) is first displayed, there are noentries in the respective boxes below “Code”, “Name” and “Comments”. Forease of explanation, the picture shown in FIG. 17(a) is a pictureresulting from entering some data of the “User 1” item with respect to“Code”, “Name” corresponding to the “Code” and “Comments”.

For changing the contents of the list 72, the cursor 23 a is moved to adesired one of the “Name” buttons by using the mouse, and the button isclicked, which results in display of a picture shown in FIG. 17(b). Thepicture shown in FIG. 17(b) contains input fields 73-75 labeled “Code”,“Name” and “Comments” which respectively correspond to “Code”, “Name”and “Comments” in the list 72 shown in FIG. 17(a). The respective inputfields can be filled with desired data (characters) through the dataentry section 22, to thereby edit, i.e. add, change or delete some orall of data previously input in each field.

If the display in the “Code” field 73, i.e. a Code number, is to bechanged, either upward or downward oriented arrow 73 a or 73 b isclicked, which causes the code number displayed in the field 73 tochange.

When the editing of the data is completed, an “OK” button 76 is clicked,which results in changing the corresponding data in the memory 24. Then,the display returns to the one shown in FIG. 17(a). The data containedin this displayed picture are the ones after the changes made using thedisplay shown in FIG. 17(b).

If a “Cancel” button 77, instead of the “OK” button 76, is pressed, theCPU 21 does not provide alterations made in the display of FIG. 17(b) tothe data, but restores the display of FIG. 17(a). In this case, thecontents of the list 72 remain the same as the previous ones.

The new management item “User 1” prepared by the process using thedisplays shown in FIGS. 17(a) and 17(b) is added to the list shown inFIG. 13, which results in the list shown in FIG. 18. Thereafter, the CPU21 processes the data in the new item “User 1” as a management item. Forexample, data in the item “User 1” can be data to be searched orretrieved.

The list of FIG. 18 contains items labeled “Processing Data”,“Manufacturer” etc. which are not shown in FIG. 13. This is becauseFIGS. 13 and 18 are different portions of the same list. In addition tothe data shown in FIGS. 13 and 18, other data, e.g. heights of thelocations where traps are disposed, operating conditions of the pipingsystem where particular traps are used (e.g. indication of whether thepiping system is continuously or intermittently operated), and so forthare also stored as part of detailed trap data in the memory 24.

The operation of the CPU 21 for adding a new management item isillustrated in the state transition diagram shown in FIG. 19.

First, the CPU 21 enters an idling state 111, and the display shown inFIG. 17(a) is displayed on the display 23.

The mouse is used to command that the display of FIG. 17(b) be displayedwhen the CPU 21 is in the idling state 111, shifting the CPU 21 into anediting step 112, so that the display shown in FIG. 17(b) is displayedon the display 23. Then, using the keys on the data entry section 22,addition, alteration and/or deletion of aimed data are done on thedisplay shown in FIG. 17(b).

After the editing of the aimed data in the editing step 112, the “OK”button 76 is pressed or clicked, resulting in the shift of the CPU 21 toan item renewal step 113. In the renewal step 113, the detail or data ofthe management item, e.g. “User 1”, edited in the editing step 112, isrenewed, and, then, the CPU 21 returns to the idling state 111. At thesame time, the display shown in FIG. 17(a) renewed in accordance withthe changes made in the editing step 112 is displayed on the screen.

If a command is given through the data entry section 22 to the CPU 21 inthe idling state 111 to initiate any data processing, the CPU 21 movesinto a data processing step 114. In the data processing step 114, theCPU 21 modifies the data of respective traps shown in FIG. 18, withrespect to the management item of which the data has been edited (e.g.added) by the use of the pictures shown in FIGS. 17(a) and 17(b).

For moving the CPU 21 out of the data processing step 114, a command isgiven through the data entry section 22, so that the CPU 21 returns tothe idling state 111.

In addition to the steps 111-114, a receiving step 115 is included. Inthe receiving step 115, data from the inspection and evaluation system 1is received. According to the invention, the editing of data of themanagement items can be done also in the inspection and evaluationsystem 1, and the editing (e.g. addition) of data made in the inspectionand evaluation system 1 is transferred to the management system 2 tomodify the processing to be done in the management system 2 inaccordance with the edited data. In other words, the management itemsmanaged by the managing system 2 can be also edited through theinspection and evaluation system 1.

For that purpose, the CPU 13 of the inspection and evaluation system 1can operate in a manner similar to the CPU 21 of the management system2.

The editing operation of the CPU 13 is now described with reference toFIG. 20. The CPU 13 fist enters into an idling state 121, which issimilar to the idling mode M2 shown in and described with reference toFIG. 6 and to the idling state 100 shown in and described with referenceto FIG. 11. In the idling state 121, the CPU 13 is awaiting a command.

When a command to add a management item is given through the data entrysection 18 to the CPU 13, the CPU 13 enters into an editing step 122. Adesired management item is added through the data entry section 18, anddetailed data relating to the added management item are entered, addedor changed.

When the addition of a new management item or editing of data of themanagement item in the editing step 122 is finished, the CPU 13 entersinto an item renewal step 123. In the item renewal step 123, the newmanagement item and its edited detailed data prepared in the editingstep 122 are added to the list of trap data stored in the memory 16.Then, the CPU 13 returns to the idling state 121. When the addition of anew item in the editing step 122 is cancelled, the CPU 13 returnsdirectly to the idling state 121 without entering in the item renewalstep 123.

If, in the idling state 121, a command to initiate any data processingis given through the data entry section 18, the CPU 13 enters in a dataprocessing step 124, and processes detailed data of traps including thenewly added management item.

For releasing the CPU 13 from the data processing step 124, a command isgiven through the data entry section 18, so that the CPU 13 returns tothe idling state 121.

For transferring the detailed data of traps including the newly addedmanagement item to the management system 2, a command is given to theCPU 13 through the data entry section 18, so that the CPU 13 enters intoa transmitting step 125. In the transmitting step 125, the CPU 13transmits data of the newly added management item together with thedetailed data of traps to the management system 2. The data aretransmitted in the frame format shown in FIG. 12, e.g. in the form ofthree-byte decimal data. After transmitting the required data, the CPU13 returns to the idling state 121.

In the management system 2, the CPU 21 enters in the receiving step 115for receiving the data transmitted from the inspection and evaluationsystem 1. Then, the CPU 21 enters in the item renewal step 113 where itadds the management item added in the inspection and evaluation system 1contained in the transmitted data. After that, the CPU 21 returns to theidling state 111, and repeats the previously stated operation.

As described above, the inspection and evaluation system 1 and themanagement system 2 are compatible with respect to data.

The CPUs 21 and 13 have been described as operating in the manner shownin the state transition diagrams of FIGS. 19 and 20, but they can bearranged to operate in different ways.

The number of management items to be added is not limited to one, buttwo or more items may be added.

According to the present invention, a piping diagram showing locationswhere respective traps are disposed can be freely drawn on the display23 of the management system 2. By relating traps in the drawn pipingdiagram with detailed data stored in the memory 24, detailed informationabout the respective traps can be directly determined from the pipingdiagram.

A program for realizing this feature is also contained in the managementprogram, and the CPU 21 operates in the following manner in accordancewith the drawing program.

The CPU 21 displays a picture like the one shown in FIG. 21 on thedisplay 23. A vertical line 30 divides the picture area into left andright regions 31 and 32. The vertical line 30 can be freely movedleftward or rightward by drag and drop, so that the ratio in areabetween the regions 31 and 32 can be changed.

In the display region 31, trap management numbers 33 in a particulararea assigned with an area number of, e.g. “001” (displayed as“Area-001”), are displayed, being vertically arranged in order from thesmallest one toward larger ones, as shown. Relatively small-sized icons34 are displayed on the left sides of the respective trap numbers 33.The respective icons 34 have shapes corresponding to traps of the trapnumbers.

Arrow buttons 31 a and 31 b are disposed on the right edge of thedisplay region 31. The arrow buttons 31 a and 31 b are used to scrollthe picture in the display region 31. In addition to the arrow buttons31 a and 31 b, a scroll box 31 c is disposed on the right edge of thedisplay region 31 to indicate what portion of the entire traps is beingdisplayed. What are displayed in the display region 31 can be changed bypressing either the arrow button 31 a or 31 b or dragging a scroll box31 c.

A piping diagram 35 for the area number “001” is displayed in the rightdisplay region 32. A plurality of icons 36-40 having a larger size thanthe icons 34 are displayed. The icons 36-40 indicate that traps aredisposed at locations in the actual piping system corresponding to theirlocations on the displayed piping diagram. For ease of knowing the trapscorresponding to the respective icons 36-40, trap numbers are displayedbelow the respective ones of the icons 36-40. Also, the respective icons36-40 have shaped corresponding to the traps which the icons represent,as the icons 34. Different from the trap numbers displayed in thedisplay region 31, the trap numbers displayed in the region 32 are thenumbers displayed in the region 31 from which zeros (0) in higherpositions in the numbers are removed. For example, trap numbers “00001”and “00100” displayed in the display region 31 are displayed as “1” and“100”, respectively.

The respective icons 34 and the icons 36-40 are linked or associatedwith the detailed data shown in FIG. 13. The cursor 23 a is moved ontoone of the icons, and the icon is clicked twice (or double-clicked).Then, the detailed data of the trap corresponding to the double-clickedicon is called out of the memory, and, the same time, a display window45 like the one shown in FIG. 22 is displayed on the display 23. Thecalled detailed data is displayed in a predetermined format in thedisplay window 45. FIG. 22 is an example resulting from double-clickingthe icon 36, which displays, in the window 45, the detailed data of thetrap with the trap management number “1” corresponding to the icon 36.

In the display window 45, the contents of data in boxes 45 a can bechanged. The cursor 23 a is moved onto a desired data box 45 a andclicked, the clicked data is renewable. The keys on the keyboard and themouse are used to renew the data in the data box 45 a.

As described previously, the detailed data includes the item “Result”(FIG. 15) showing the judgment of the data in “Evaluation” in the listshown in FIG. 14. The CPU 21 reflects the Result of judgment on thedisplay of each of the icons 34, 36-40 in the display region 32. Forexample, as shown in FIG. 21, the icons for traps with the trap number“5” and “7” of which the judgment results shown in the column “Result”are “Failed” are displayed in a different form than the remaining ones.Specifically, the icons 34 for the trap No. 00007 in the region 31 andthe icon 37 for the trap No. 5 (00005) in the region 32 are shaded.Instead of shading, coloring or reversing may be used.

The display shown in FIG. 21 consists of two separate independentdisplays, namely, a piping diagram display 46 showing only the pipingdiagram 35 and a main display 47 showing items other than the pipingdiagram 35, with the main picture 47 superimposed on the display 46 (seeFIG. 23).

Any desired piping diagram picture 46 may be prepared by drawing dots,lines and characters, using the mouse and keyboard of the data entrysection 22.

Icons 34 and 36-40 can be freely moved across the main picture 47 by,for example, dragging. In the display region 31, the icons 34 and 36-40are displayed in a smaller size with the trap management numbers 33displayed on the right side of the respective icons. When the icons aredragged into the display region 32, the icons are enlarged as the icons36-40 with trap management numbers displayed below the respective icons.The display window 45 displayed when one of the icons 34 and 36-40 isdouble-clicked is also displayed on the main picture 47.

For preparing the picture shown in FIG. 21, for example, a desiredpiping diagram 35 in a desired area (Area No. 001 in the illustratedexample) is first drawn on the picture 46, which results in a pictureshown, for example, in FIG. 24. In the default, all of the icons aredisplayed in the left-hand side display region 31 as shown in FIG. 24.

Then, a desired one of the icons 34 in the right display region 31, e.g.the icon for the trap having a trap number of “000001” (or “1”), isdragged and dropped to a desired location on the piping diagram 35 asindicated by a broken line arrow in FIG. 24. The location corresponds tothe actual location in the piping system where the trap No. 1 isdisposed. This results in the picture shown in FIG. 25 in which the icon36 (34) for the desired trap No. 1 is displayed at the desired location.When the icon 34 for the trap No. 1 is moved to the display region 32,the icons and trap numbers lower in order are shifted upward asindicated by an arrow 31 d in FIG. 25.

In a similar manner, the icons 34 for the traps having the managementnumbers “2”, “3”, “5” and “6” are dragged and dropped to desiredlocations on the piping diagram 35, which finally results in the displayshown in FIG. 21.

The CPU 21 operates in accordance with the state transition diagramshown in FIG. 26 to realize the drawing of the piping diagram 35, thedisplaying of the icons 34, and 36-40 on the picture containing thepiping diagram 35, and the displaying of the display window 45 withdetailed trap data.

As shown in FIG. 26, the CPU 21 transits among an idling state 55, apiping diagram drawing step 56, an icon moving step 57, a detailed datadisplaying step 58 and a data renewal step 59.

First, the CPU 21 enters in the idling step 55 to await a command fromthe data entry section 22. An area to be supervised is selected byoperating the data entry section 22, namely, by operating the mouse orkeys on the keyboard.

Thereafter, a command to initiate the drawing of the piping diagram 35is given with the mouse or keys, which causes the CPU 21 to enter thepiping diagram drawing step 56. In the step 56, a desired piping diagram35 is drawn in the manner as shown in FIG. 24 by means of the mouse andkeys. The mouse or keys are used to notify the CPU 21 when the drawingof the piping diagram 35 is completed. Then, the CPU 21 returns to theidling step 55.

Thereafter, as indicated by the broken line arrow in FIG. 24, a desiredicon 34 is selected and dragged in the idling step 55. When the draggingof the icon 34 is initiated, the CPU 21 shifts into the icon moving step57. In the step 57, the CPU 21 moves the icon in response to thedragging. Then, the icon 34 (36) is dropped at the desired location onthe piping diagram 35, the CPU 21 fixes it to that location and returnsto the idling state 55.

As shown in FIG. 21, when a desired icon, e.g. the icon 36, is selectedand double-clicked, the CPU 21 enters in the detailed data displayingstep 58. In the detailed data displaying step 58, the CPU 21 calls thedetailed data of the trap corresponding to the selected icon 36 from thememory 24, and, at the same time, displays the display window 45 on thescreen as shown in FIG. 22. The CPU 21 displays the called detailed datain this display window 45. When a command to end the detailed datadisplaying step 58 is given through the mouse or keys to the CPU 21, theCPU 21 returns to the idling state 55.

In the detailed data displaying step 58, the cursor 23 a may be movedonto one of the data boxes 45 a displayed in the display window 45 andclicked. This puts the CPU 21 in the data renewal step 59. In the datarenewal step 59, the CPU 21 changes the manner of displaying theselected data box 45 a by, for example, reversing the characters andbackground, so that it is indicated that the data in the box 45 a can berenewed. Then, the mouse or keys are operated to enter new data, and thedata in the selected box 45 a is renewed accordingly. Then, the CPU 21returns to the detailed data displaying step 58.

As described above, according to the invention, it is easy to grasp thepositional relationship among traps and the detailed data of the trapsby simply seeing the piping diagram 35 and the icons 36-40, for example,disposed on it.

Since icons for defective traps are displayed in a different way fromicons for “good” traps, it is also easy to identify such defectivetraps.

Furthermore, since any piping diagram can be drawn freely and sinceicons can be freely moved and disposed at any locations on the pipingdiagram, a variety of piping systems can be handled.

In the above-described example, a piping diagram is drawn on the displayscreen, but the plan of a plant may be drawn and icons for traps may bedisposed on such plan. Alternatively, picture information, e.g. photos,of respective traps may be stored as part of detailed data of therespective traps in the memory 24, and the photos or picture informationof traps may be displayed together with detailed data.

The management system 2 of the present invention has a function todetermine in what order traps should be inspected and evaluated by theinspection and evaluation system 1 to provide the most efficientoperation. The determination is made, using the detailed data of therespective traps.

The management program includes a trap inspecting and evaluating orderdetermination program. The CPU 21 operates in the following manner inaccordance with the management program.

The CPU 21 first displays a picture like the one shown in FIG. 27 on thescreen of the display 23. This picture is used to select traps to beinspected and evaluated. The picture includes six windows 81-86 arrangedin two rows and three columns.

The upper left window 81 is used to select the area in which traps to beinspected are disposed. Area numbers 81 a are displayed, being arrangedvertically with square check boxes 81 b on the left side of therespective area numbers.

When, for example, the area numbered 001 is to be selected, the cursor23 a is moved on the check box 81 for the area number “001”, and theleft button of the mouse is clicked to mark the box with a check, whichindicates that the area “001”, has been selected. More than one area maybe selected instead.

Above the upper left corner of the window 81, a word “Area” 81 cindicating that the window is an area selection window is displayed witha check box 81 d disposed on its left. When the check box 81 is marked,the selection of areas made in the window 81 is made effective. Themarking of the box 81 d is made also by moving the cursor 23 a andclicking the left button of the mouse. The check marks in the checkboxes 81 b and 81 d, etc. can be removed by clicking the marked boxesagain.

Arrow buttons 81 e and 81 f are disposed at the top and bottom ends ofthe right edge of the area selection window 81 for scrolling the displaywithin the window 81. Either of the two buttons are pressed, the displayscrolls upward or downward, so that that part of the display, e.g. thearea number “006”, which is not currently seen appears in the window 81.A scroll box 81 g in a scroll bar extending between the two arrowbuttons moves upward or downward as the display is scrolled. The scrollbox 81 g can be also used to scroll the display by moving the cursor 23a to the scroll box 81 g and dragging up or down.

The middle window 82 in the upper row is an application selection windowfor selecting the application of traps to be inspected. In the window82, plural applications of traps are displayed, including “C-Dryer” (fordrying cylinders), “Drip” (for main piping), “Heating” (for heatingrooms), “Process” (for processing piping) and “Tracer” (formeasurement). Since the configuration of the window 82 is similar to thewindow 81, no detailed description is given, but the same letter isattached at the end of the reference numeral “82” for an item shown inthe window 82 similar to the corresponding one in the window 81. Forexample, if traps used in a cylinder drying piping system, a main pipingsystem, a heating piping system, and a processing piping system are tobe inspected, check boxed 82 b disposed on the right side of “C-Dryer”,“Drip”, “Heating” and “Process” are marked. To make the selectioneffective, the box 82 d is marked with a check mark.

The window 83 is for steam pressures in the piping where traps to beinspected and evaluated are used. Indications are displayed within thewindow 83, including, for example, “0-50” (pressure not less than 0 psibut less than 50 psi), “50-150” (pressure not lower than 50 psi butlower than 150 psi), “150-300” (pressure not lower than 150 psi butlower than 300), “300-600” (pressure not lower than 300 psi but lowerthan 600 psi), and “>600” (pressure of 600 psi or higher). Since theconfiguration of the window 83, too, is similar to that of the window81, its detailed description is not given, but the same letters areattached at the end of a reference numeral “83” for similar items. Iftraps used in a piping system having a steam pressure of from 0 psi butbelow 300 psi, for example, are to be inspected, the check boxes 83 b onthe right side of “0-50”, “50-150” and “150-300” are marked.

The leftmost window 84 in the lower row is for the time periods duringwhich traps to be inspected and evaluated have been used. The window 84may contain displays of, for example, “0-12” (from zero to twelvemonths), “13-24” (from thirteen months to twenty-four months), “25-36”(from twenty-five months to thirty-six months), “37-48” (fromthirty-seven months to forty-eight months) and “49-60” (from forty-ninemonths to sixty months). If traps which have been used for, for example,less than one year are to be inspected, the check box 84 b on the rightside of “0-12” is marked. Since the configuration of the window 84 isthe same as that of the window 81, no detailed description is given, butthe same letters are attached at the end of the reference numeral “84”.

The central window 85 in the lower row is for priority or importance oftraps to be inspected. In this window 85, displays, for example,“M-Important” (most important), “Important” (relatively important),“General”, “Aux” (Auxiliary), and “Another” (important only in winter,for example). For inspecting the most important traps, relativelyimportant traps and general traps, the check boxes 85 b on the rightside of “M-important”, “Important” and “General” are marked. Since theconfiguration of the display window 85 is similar to that of the window81, no more description about it is made, but the same letters areattached to the end of the reference numeral “85”.

The rightmost window 86 in the lower row is for selecting trap types.The window 86 may contain displays of, for example, “BUCKET”(bucket-type traps), “DISC” (disc-type traps), “FLOAT” (float-typetraps), “THERMO” (thermostatic traps), and “TEMP. ADJ.”(temperature-adjustable traps). For inspecting and evaluatingbucket-type traps, disc-type traps and thermostatic-adjustable traps,the check boxes 86 b in front of “BUCKET”, “DISC” and “THERMO” aremarked as shown. However, in the illustrated example, since the checkbox for “Trap Type” is not marked, traps of any types are subjected toselection. The configuration of the display window 86 is similar to thatof the window 81, and, therefore, no more description about it is given,but the same letters are attached to the end of the reference numeral“86”.

After selecting desired items in the respective windows 81-86, a button87 identified as “Select” disposed on the right-hand side edge of thescreen is pressed by moving the cursor 23 a to the box 87 and clickingthe left button on the mouse. Then, the CPU 21 searches the detaileddata of traps including those shown in FIG. 13 for those data which meetall of the items set in the respective windows 81-86. For example, whenthe “select” button 87 is pressed with the setting of items as shown inFIG. 27, the CPU 21 searches for traps which are used in the area No.001, are used in cylinder drying piping, main piping, heating piping andprocessing piping systems with the steam pressure therein being zero orhigher but lower than 300 psi, have been used for twelve months or less,and are classified as “most important”, “relatively important” or“ordinary”.

If a button 88 identified as “Cancel” below the “Select” button 87 ispressed instead of the “Select” button 87, the CPU 21 ends the displayof the picture of FIG. 27. If a button 89 labeled as “None” disposedbelow the “Cancel” button 88 is pressed, all the settings made arecleared so that all the check marks in the check boxes disappear. If abutton 80 below the “None” button 89 is pressed, all the check boxes 81b, 82 b, 83 b, 84 b, 85 b and 86 b are marked.

After the searching by the CPU 21 is completed, the CPU 21 changes thedisplay to one like the display shown in FIG. 28. This picture includesthe trap numbers 91 a, such as “00001”, of the traps to be inspected,and the area numbers of the areas selected (the area number “001” in theillustrated example), which are searched for, using the display of FIG.27. The picture of FIG. 28 is used to determine the order of inspectionof the selected traps.

The picture includes two display windows 91 and 92 arranged horizontallyadjacent to each other. The trap management numbers 91 a of the trapsfound are displayed in the window 91. The trap numbers are arrangeddownward in an increasing order with the smallest number being disposeduppermost. On the left side of each trap number, the area number 91 b ofthe area in which that trap is disposed is displayed. Furthermore, onthe left side of that area number, an icon 91 c having a shaperepresenting the type of that trap is displayed. The display in thewindow 91 can be scrolled, using arrow buttons 91 d and 91 e and ascroll box 91 f, in a similar manner as described for the window 81shown in FIG. 27.

If it is desired to inspect the trap having a trap number of “00005”first, the cursor 23 a is moved to the area number 91 b on the left sideof the number “00005”, and the mouse button is clicked. It causes thereversal of the display of the area number, by which one can know thatthe trap having a trap number of “00005” has been selected.

Then, the cursor 23 a is moved onto the uppermost one 93 of four arrowbuttons 93-96 displayed in the space between the windows 91 and 92, andthe button 93, which is directed rightward, is pressed or clicked, usingthe mouse, as shown in FIG. 29. This causes the trap number “00005”, theassociated area number “001”, and the associated icon to be moved fromthe left window 91 to the right window 92. At the same time, in thewindow 91, larger trap numbers 91 a which have been displayed below themoved trap number “00005”, and their associated area number 91 b andicons 91 c are shifted upward, as indicated by an arrow 51 h in FIG. 29.

The indication “Selected Traps 1” above the window 92 indicates that thenumber of traps selected is one.

The same processing is repeated for all the remaining traps in thewindow 91 in the desired order of inspection, which results in a displayas exemplified in FIG. 30. In the display window 92, the trap numbers 91a, their area numbers 91 b and their icons 91 c are displayed, beingarranged vertically downward in the selected order. The number ofselected traps, e.g. “18”, is displayed as “Selected Traps 18”. Thewindow 91 is now empty.

When the number of trap numbers 91 a, area numbers 91 b and icons 91 cwhich have been moved into the display window 92 becomes so large thatall of them cannot be displayed in the screen, buttons 92 a and 92 bwith upward and downward arrows and a scroll box 92 c are automaticallydisplayed at the right edge of the window 92, as shown in FIG. 30. Bythe arrow buttons 92 a and 92 b and the scroll box 92 c, the display canbe scrolled upward or downward. On the other hand, when it is no longernecessary to scroll the display in the window 91, the arrow buttons 91 dand 91 e and the scroll box 91 f automatically disappear from thescreen.

Although not shown in detail in FIG. 30, if it is desired to change theorder of arrangement of the trap numbers in the window 92, the cursor 23a is moved to the area number 91 b for the trap number 91 a of the trapto be moved. Then, the left button on the mouse is clicked, whichreverses the display of the area number 91 b. After that either one ofthe upward and downward oriented arrow buttons 97 and 98 is pressed,which causes the selected trap management number 91 a to move upward ordownward. In this way, the order of the selected traps and, hence, theorder of inspection of the selected traps can be changed.

For removing any of the traps in the window 92, the cursor 23 a is movedto the area number in front of the trap number of the trap to beremoved. Then, the left button on the mouse is clicked, which causes thereversal of the display of the area number. After that, the button 94with a leftward oriented arrow on it displayed in the area between thewindows 91 and 92 is pressed. This causes the management number 91 ofthe trap to be removed from the list in the window 92, its area number91 b and its icon 91 c are moved back into the display window 91. Thus,the selection of the desired trap is cancelled.

If the messages displayed in the window 91 should be moved into thedisplay window 92 all at once, rather than one by one, a button 95 withtwo rightward oriented arrows displayed in the area between the windows91 and 92 is pressed, which causes all the displays in the window 91 tobe moved into the window 92 at once.

If it is desired that the displays in the window 92 be removed to thedisplay window 91 all at once, a button 96 with two leftward orientedarrows is pressed.

When the re-arranging of the traps to be inspected has been completed, abutton 99 with a display of “Save” displayed in the right side portionof the window 92 is pressed, as shown in FIG. 30. Then, the CPU 21operates to save or store the result of the re-arrangement in the memory24, whereby the order of inspecting the traps by the inspection andevaluation system 1 is determined. If a button 90 with “Cancel” ispressed instead of the button 99, the CPU 21 stops the inspection orderdetermination.

With the arrangement shown in FIGS. 27 and 28, a button 80 with anindication of “All” shown in FIG. 27 may be pressed to select (i.e.search) all the detailed data. After that, desired ones can be selectedfrom them, using the display shown in FIG. 28.

The operation of the CPU 21 of the management system 2 to determine theorder of trap inspection can be expressed in the form of the flow chartshown in FIG. 31.

First, various conditions for searching for traps to be selected aredetermined in the manner described with reference to FIG. 27 (Step S2).Then, the “Select” button 87 is pressed to make the CPU 21 searchdetailed data of traps out of the data stored in the memory 24 accordingto the determined conditions (Step S4). The search may be executed inaccordance with a flow chart shown in FIGS. 32A and 32B, for example.

Upon recognition of the pressing of the “Select” button 87 in Step S200,the CPU 21 extracts the detailed data of all the traps (Step S202).

Next, the CPU 21 checks if the check box 81 d in front of the message“Area” in FIG. 27 is marked with a check mark (Step S204). If the box 80d is marked (i.e. the answer is YES), the CPU 21 extracts, from thedetailed data of all the traps extracted in Step S202, the dataincluding the marked area number(s) displayed in the area selectionwindow 81 (Step S206). The extracted data are now to be searched in thefollowing step. If it is found that the check box 81 d for “Area” is notmarked (i.e. the answer is NO), the CPU 21 skips Step S206 to Step S208.

In Step S208, the CPU 21 checks if the check box 82 d for “Application”above the box 82 in FIG. 27 is marked with a check. If it is, i.e. ifthe answer is YES, the CPU 21 extracts from the data from Step S206 orthe data from Step S204, the data of traps of which the application(s)is marked in the application window 82 are extracted (Step S210). If itis found in Step S208 that the check box 82 d for “Application” is notmarked (i.e. the answer is NO), the CPU 21 skips Step S210 to Step 212.

In Step S212, the CPU 21 checks if the check box 83 d for “Pressure”shown above the box 83 in FIG. 27 is marked. If it is (i.e. if theanswer is YES), the CPU 21 extracts from the data from Step S210 or thedata from Step S208, the data of traps which are used in piping systemshaving a steam pressure(s) marked in the pressure window 83 shown inFIG. 27 (Step S214). The extracted data is now subject to the processingin Step S216. If the check box 83 d is not marked, the CPU 21 skips StepS214 to Step S216.

In Step S216, the CPU 21 checks if the check box 84 d for “Month of Use”above the window 84 in FIG. 27 is marked with a check. If the box 84 dis marked (i.e. if the answer is YES), the CPU 21 extracts, from thedata from Step S214 or the data from Step S212, the data of traps whichhave been used for time periods marked in the window 84 (Step S218). Ifthe check box 84 d is not marked (i.e. the answer is NO), the CPU 21skips Step S218 to Step S220.

In Step S220, the CPU 21 checks if the check box 85 d for “Priority”displayed above the window 85 in FIG. 27 is marked. If the box 85 d ismarked, i.e. if the answer to the question in Step S220 is YES, the CPU21 extracts, from the data from Step S218 or the data from Step S216,the data of traps having priority marked in the window 85 (Step S222).If, on the other hand, the check box 85 d is not marked (i.e. if theanswer is NO), the CPU skips Step S222 to Step S224.

In Step S224, the CPU 21 checks if the check box 86 d for “Trap Type”displayed above the window 86 in FIG. 27 is marked with a check mark. Ifthe box 86 d is marked (i.e. if the answer to the question in Step S224is YES), the CPU 21 extracts, from the data from Step S222 or the datafrom Step 220, the data of traps of the trap type(s) marked in thewindow 86 (Step S226). Then, the CPU 21 ends the data searching step S4(FIG. 31). On the other hand, if it is found in Step S224 that the checkbox 86 d is not marked (i.e. the answer is NO), the CPU 21 skips StepS226 and ends the searching step S4.

Then, the CPU 21 displays the result of the search made in Step S4 inthe form as shown in FIG. 28 (Step S6). The data displayed include thetrap management numbers 91 a, the area numbers 91 b and the icons 91 cof the traps of which detailed data have been extracted in accordancewith flow chart shown in FIGS. 32A and 32B. The extracted data arere-arranged in the manner as described with reference to FIGS. 28 and 30(Step S8), and the re-arranged data are stored in the memory 24 (StepS10) to end the management program based on the flow chart of FIG. 31.

According to the present invention, the trap inspection order determinedin the above-described manner in the management system 2 can betransferred to the inspection and evaluation system 1 and checked on thesystem 1.

Specifically, after the trap inspection order is determined in themanagement system 2, the management system 2 is connected to theinspection and evaluation system 1 by the cable 3, as shown in FIG. 1.Then, the inspection and evaluation system 1 is conditioned forreceiving data from the management system 2 in a manner not described indetail. After that, data is transferred from the management system 2 tothe inspection and evaluation system 1. Now, the trap inspection orderis stored in the memory 16 of the inspection and evaluation system 1.The stored data of trap inspection order include at least the trapmanagement numbers, the area numbers and the trap model names.

After the trap inspection order is transferred to the inspection andevaluation system 1, the engagement system 2 is separated from theinspection and evaluation system 1 by removing the cable 3. After that,the inspection and evaluation of traps are initiated with the inspectionand evaluation system 1.

FIG. 33 shows a flow chart of the operation of the CPU 13 of theinspection and evaluation system 1. The program shown in FIG. 33 isstored in the control program region 163 in the memory 16 of theinspection and evaluation system I as part of the control program.

First, the CPU 13 displays, on the display 17, the area and managementnumbers of the first one of the traps transmitted in the orderdetermined in the management system 2, in the form as shown in FIG. 5(Step S302). Specifically, letters “NO.” followed by the area number 171and the trap management number 172 with a hyphen disposed between thenumbers 171 and 172, are displayed in the upper row. In the lower row ofthe display, letters “MODEL” and the trap model name 173 are displayed.

The CPU 13 calls the correlation data D for the displayed trap modelname 173 from the trap data shown in FIG. 3 (Step S304). Then, anoperator urges the probe 1 against the surface of the housing of thefirst trap (not shown) to be inspected, to thereby initiate theinspection and evaluation (Step S306). In case of the example shown inFIG. 5, the trap to be inspected first is of a model name “JKL”, has amanagement number “00005” and is used in an area having an area number“001”.

Whether or not the inspection and evaluation of all the traps arefinished is checked (Step S308). If the answer to the question made inStep S308 is NO, which means that there is another trap to be inspected,the CPU 13 displays the area number 171, the trap management number 172and the model name of the trap to be inspected and evaluated next, onthe display 17 (Step S310). Then, the CPU 13 returns to Step S304. Theprocessing provided in Step S304 through Step S308 is repeated until allof the selected traps are inspected and evaluated.

When all of the selected traps have been inspected and evaluated, i.e.if the answer to the question in Step S308 is YES, the CPU 13 displays amessage (not shown) indicating that all the traps have been inspectedand evaluated, on the display 17 (Step S312). Then, the operationillustrated in FIG. 33 ends.

As described above, according to the invention, only desired ones of anumber of traps used in a plant can be selected and arranged in adesired order for inspection. Thus, efficient inspection and evaluationof traps can be realized.

In the inspection and evaluation system 1, each time a trap is inspectedand evaluated, the area number 171, the trap management number 172 andthe model name 173 of the next trap to be inspected are displayed on thedisplay 17. Thus, the operator can easily know which trap should beinspected next. At the same time, the correlation data D for thedisplayed trap is automatically set for use in inspecting and evaluatingthat trap. In other words, there is no need for the operator to take anyspecial steps for calling the required correlation data D.

In the above, six conditions have been described as bases for searchingfor traps to be inspected. They are the area number, the application oruse of traps, the steam pressure, the time period traps have been used,the priority or importance of traps, and trap types. But the conditionsneed not be limited to those discussed above. For example, a trap modelname, a manufacturer, a level (height) at which traps are disposed, anoperating condition of the piping system including traps (e.g. whetherthe piping system is continuously operated or intermittently operated)etc. may be used as the bases.

Although the described program is to search for data of traps which meetall the set conditions, but the program may be arranged to search fordata of traps which meet at least one of the set conditions.

In the described example, the order of extracted traps to be inspectedis changed manually, but the re-arrangement of data may be doneautomatically on the basis of, for example, positional relationshipamong the traps as shown in FIG. 21. For example, traps may be arrangedautomatically in accordance with the distance from the entrance to aparticular plant.

In the above-described example, the trap to be inspected is displayed onthe display 17, but it may be output in the form of sound. For example,the trap to be inspected may be announced through a loudspeaker disposedin association with the inspection and evaluation system 1.

The CPU 13 and 21 of the inspection and evaluation system 1 and themanagement system 2 have been described to operate in the manners asrepresented by the flow charts shown in FIGS. 33 and 31, respectively.However, they can be operated in different manners only the same effectscan be obtained.

In the described example, the steam pressure in the interior of a trapis determined indirectly by detecting the temperature of the surface ofthe housing of that trap. However, if the exact steam pressure in thetrap can be known, it may be manually input through the data entrysection or keys 18. The use of exact steam pressures can provide moreexact trap evaluation than using indirectly obtained steam pressures.Further, if high exactness is not required in evaluation, onlymeasurements of vibrations may be used in evaluating traps or computingthe amount of steam leakage.

The present invention has been described by means of systems forinspecting and evaluating and managing steam traps, but the presentinvention may be equally applied to systems for other traps, such as airtraps and gas traps. Further, the present invention may be applied tosystems for inspecting and evaluating and managing other devices, suchas valves and rotary machines.

The management system 2 need not be a personal computer, but it may beconstructed as a dedicated system.

Though the inspection and evaluation system 1 and the management system2 have been described as being separate systems, but they may beintegrated in a single system.

1. An equipment management system for managing devices formingequipment, comprising: a detailed data memory section having storedtherein detailed data of the respective devices; a display having adisplay screen; a first display control section causing a representationof the equipment to be displayed on the display screen and also causingat least one of symbols corresponding to the respective devices to bedisplayed on the display screen at locations on the representation ofthe equipment; a symbol selecting section selecting a desired one of thesymbols displayed on the display screen; and a second display controlsection calling detailed data corresponding to the selected symbol fromthe detailed data memory section and causing the called detailed data tobe displayed on the display screen, wherein none of the detailed datafor non-selected symbols is displayed.
 2. The equipment managementsystem according to claim 1 wherein: the detailed data of the deviceincludes one of first judgment data indicating that the device isoperating normally and second judgment data indicating that the deviceis not operating normally; and the first display control section causesa symbol of a device, for which the detailed data contains one of thefirst and second judgment data, to be displayed in a different mannerthan a symbol of a device for which the detailed data contains the otherof the first and second judgment data.
 3. The equipment managementsystem according to claim 1 wherein: the first display control sectionincludes an equipment representation display control section displayingthe equipment representation on the display screen in response to anexternally applied representation drawing command, and a symbol displaycontrol section displaying a symbol at a desired position on theequipment representation on the display screen in response to anexternally applied symbol positioning command.
 4. The equipmentmanagement system according to claim 1 wherein the equipment is a pipingsystem, and the devices are traps of different types disposed in thepiping system.
 5. A computer-readable record medium having recordedtherein an equipment management program which is executed by a computerincluding a display having a display screen for managing a plurality ofdevices constituting equipment, the equipment management program causingthe computer to execute: a first display sequence for displaying arepresentation of the equipment on the display screen and alsodisplaying a symbol for at least one of the devices at an appropriateposition on the equipment representation on the display screen; a symbolselecting sequence for selecting a desired one of the symbols displayedon the display screen; and a second display sequence for callingdetailed data of the device corresponding to the selected symbol out ofdetailed data stored beforehand and displaying the called detailed dataon the display screen, wherein none of the detailed data fornon-selected symbols is displayed.
 6. The computer-readable recordmedium according to claim 5 wherein: the detailed data of the deviceincludes one of first judgment data indicating that the device isoperating normally and second judgment data indicating that the deviceis not operating normally; and the first display control section causesa symbol of a device for which the detailed data contains one of thefirst and second judgment data to be displayed in a different mannerthan a symbol of a device for which the detailed data contains the otherof the first and second judgment data.
 7. The computer-readable recordmedium according to claim 5 wherein: the first display sequence includesan equipment representation displaying sequence for displaying theequipment representation on the display screen in response to anexternally applied representation drawing command, and a symboldisplaying sequence for displaying a symbol at a desired position on theequipment representation on the display screen in response to anexternally applied symbol positioning command.
 8. The computer-readablerecord medium according to claim 5 wherein the equipment is a pipingsystem, and the devices are traps of different types disposed in thepiping system.
 9. An equipment management method for managing devicesforming equipment, comprising: storing detailed data of the respectivedevices; causing a representation of the equipment to be displayed on adisplay screen and also causing at least one of symbols corresponding tothe respective devices to be displayed on the display screen atlocations on the representation of the equipment; selecting a desiredone of the symbols displayed on the display screen; and calling detaileddata corresponding to the selected symbol and causing the calleddetailed data to be displayed on the display screen, wherein none of thedetailed data for non-selected symbols is displayed.
 10. The equipmentmanagement method according to claim 9 wherein: the detailed data of thedevice includes one of first judgment data indicating that the device isoperating normal and second judgment data indicating that the device isnot operating normal; and wherein the method further comprises: causinga symbol of a device of which the detailed data contains one of thefirst and second judgment data to be displayed in a different mannerthan a symbol of a device of which the detailed data contains the otherof the first and second judgment data.
 11. The equipment managementmethod according to claim 9 further comprising: displaying the equipmentrepresentation on the display screen in response to an externallyapplied representation drawing command, and displaying a symbol at adesired position on the equipment representation on the display screenin response to an externally applied symbol positioning command.
 12. Anequipment management method for managing equipment including a pluralityof devices, comprising: displaying a representation of equipment on adisplay screen and also displaying a symbol for at least one of thedevices at an appropriate position on the equipment representation onthe display screen; selecting a desired one of the symbols displayed onthe display screen; and calling detailed data for the selected deviceout of detailed data stored beforehand and displaying the calleddetailed data on the display screen, wherein none of the detailed datafor non-selected symbols is displayed.
 13. The method according to claim12 wherein: the detailed data of the device includes one of firstjudgment data indicating that the device is operating normal and secondjudgment data indicating that the device is not operating normal; andthe method further comprising causing a symbol of a device of which thedetailed data contains one of the first and second judgment data to bedisplayed in a different manner than a symbol of a device of which thedetailed data contains the other of the first and second judgment data.14. The method according to claim 12 further comprising: displaying theequipment representation on the display screen in response to anexternally applied representation drawing command, and displaying asymbol at a desired position on the equipment representation on thedisplay screen in response to an externally applied symbol positioningcommand.